impostazioni backref classicthesis

Ciao a tutti,
sto incontrando un problema nella stesura della mia tesi di laurea.
utilizzo texshop su un macbook, con texlive2011 installato, e lo stile classicthesis v3.1.
ho raggiunto un buon livello (a mio parere) di stesura del documento, ma stamattina mi sono accorto che le backreferences nella bibliografia alla fine del documento sono in lingua inglese (i.e. “Cited on page –“).
confrontando il mio preambolo con l’originale di classithesis ho notato che all’inizio del lavoro avevo tolto le righe di codice:

`\newcommand{\backrefnotcitedstring}{\relax}%(Not cited.)
\newcommand{\backrefcitedsinglestring}[1]{(Citato alla pagina~#1.)}
\newcommand{\backrefcitedmultistring}[1]{(Citato alle pagine~#1.)}
\ifthenelse{\boolean{enable-backrefs}}%
{%
\PassOptionsToPackage{hyperpageref}{backref}
\usepackage{backref} % to be loaded after hyperref package
\renewcommand{\backreftwosep}{ e~} % separate 2 pages
\renewcommand{\backreflastsep}{, e~} % separate last of longer list
\renewcommand*{\backref}[1]{} % disable standard
\renewcommand*{\backrefalt}[4]{% detailed backref
\ifcase #1 %
\backrefnotcitedstring%
\or%
\backrefcitedsinglestring{#2}%
\else%
\backrefcitedmultistring{#2}%
\fi}%
}{\relax} `

perchè durante la compilazione sorgevano errori del tipo: command already defined.
solo che non riuscivo a capire qual’è l’altro pacchetto che li definisce, allora le avevo semplicemente tolte dal preambolo e tutto funzionava, ma non mi ero accorto che i riferimenti erano in lingua inglese. stamattina ho aggiunto di nuovo quelle righe di codice al preambolo e ottengo sempre i soliti errori. ignorandoli, il risultato è corretto, i riferimenti sono in italiano, ma vorrei eliminare quella ridondanza fastidiosa in fase di compilazione.
il preambolo completo è il seguente:

`% 1. Configure classicthesis for your needs here, e.g., remove “drafting” below
% in order to deactivate the time-stamp on the pages

\PassOptionsToPackage{eulerchapternumbers,subfig,beramono,%
eulermath,pdfspacing,drafting,parts}{classicthesis}

\usepackage{ifthen}
\newboolean{enable-backrefs} % enable backrefs in the bibliography
\setboolean{enable-backrefs}{true} % true false

% ****************************************************************************************************
% 2. Personal data and user ad-hoc commands
% ****************************************************************************************************
\newcommand{\myTitle}{Tesi di Laurea Magistrale in Ingegneria Gestionale\xspace}
\newcommand{\mySubtitle}{La gestione operativa del magazzino: il problema di Storage Location Assignment\xspace}
%\newcommand{\myDegree}{\xspace}
\newcommand{\myName}{Marco Braglia\xspace}
\newcommand{\myProf}{Mauro Dell'Amico\xspace}
\newcommand{\myOtherProf}{Put name here\xspace}
\newcommand{\mySupervisor}{Put name here\xspace}
\newcommand{\myFaculty}{Facoltà di Ingegneria\xspace}
\newcommand{\myDepartment}{Sede di Reggio nell'Emilia\xspace}
\newcommand{\myUni}{\protect{Università degli Studi di Modena e Reggio Emilia}\xspace}
\newcommand{\myLocation}{Reggio Emilia\xspace}
\newcommand{\myTime}{Novembre 2011\xspace}
\newcommand{\myVersion}{version 3.1 BETA\xspace}

% ********************************************************************
% Setup, finetuning, and useful commands
% ********************************************************************
%\newcounter{dummy} % necessary for correct hyperlinks (to index, bib, etc.)
%\newlength{\abcd} % for ab..z string length calculation
%\providecommand{\mLyX}{L\kern-.1667em\lower.25em\hbox{Y}\kern-.125emX\@}
%\newcommand{\ie}{i.\,e.}
%\newcommand{\Ie}{I.\,e.}
%\newcommand{\eg}{e.\,g.}
%\newcommand{\Eg}{E.\,g.}
% ****************************************************************************************************

% ****************************************************************************************************
% 3. Loading some handy packages
% ****************************************************************************************************
% ********************************************************************
% Packages with options that might require adjustments
% ********************************************************************

\PassOptionsToPackage{applemac}{inputenc}
\usepackage{inputenc}

\PassOptionsToPackage{italian}{babel}
\usepackage{babel}

\PassOptionsToPackage{square}{natbib}
\usepackage{natbib}

\PassOptionsToPackage{fleqn}{amsmath} % math environments and more by the AMS
\usepackage{amsmath}
\usepackage{amsthm}

\usepackage[shortlabels]{enumitem}
\usepackage{eurosym}

\usepackage{braket}
% ********************************************************************
% General useful packages
% ********************************************************************

\PassOptionsToPackage{T1}{fontenc} % T2A for cyrillics
\usepackage{fontenc}
\usepackage{xspace} % to get the spacing after macros right
\usepackage{mparhack} % get marginpar right
\usepackage{fixltx2e} % fixes some LaTeX stuff
\PassOptionsToPackage{printonlyused,smaller}{acronym}
\usepackage{acronym} % nice macros for handling all acronyms in the thesis
%\renewcommand*{\acsfont}[1]{\textssc{#1}} % for MinionPro
\renewcommand{\bflabel}[1]{{#1}\hfill} % fix the list of acronyms
% ****************************************************************************************************

% ****************************************************************************************************
% 4. Setup floats: tables, (sub)figures, and captions
% ****************************************************************************************************
\usepackage{tabularx} % better tables
\setlength{\extrarowheight}{3pt} % increase table row height
%\newcommand{\tableheadline}[1]{\multicolumn{1}{c}{\spacedlowsmallcaps{#1}}}
\newcommand{\myfloatalign}{\centering} % to be used with each float for alignment
\usepackage{caption}
\captionsetup{format=hang,font=small}
\usepackage{subfig}
\usepackage{multirow}
% ****************************************************************************************************

% ****************************************************************************************************
% 5. Setup code listings
% ****************************************************************************************************
\usepackage{listings}
%\lstset{emph={trueIndex,root},emphstyle=\color{BlueViolet}}%\underbar} % for special keywords
\lstset{language=[LaTeX]Tex,%C++,
keywordstyle=\color{RoyalBlue},%\bfseries,
basicstyle=\small\ttfamily,
%identifierstyle=\color{NavyBlue},
commentstyle=\color{Green}\ttfamily,
stringstyle=\rmfamily,
numbers=none,%left,%
numberstyle=\scriptsize,%\tiny
stepnumber=5,
numbersep=8pt,
showstringspaces=false,
breaklines=true,
frameround=ftff,
frame=single,
belowcaptionskip=.75\baselineskip
%frame=L
}
% ****************************************************************************************************

% ****************************************************************************************************
% 6. PDFLaTeX, hyperreferences and citation backreferences
% ****************************************************************************************************
% ********************************************************************
% Using PDFLaTeX
% ********************************************************************
\PassOptionsToPackage{pdftex,hyperfootnotes=false,pdfpagelabels}{hyperref}
\usepackage{hyperref} % backref linktocpage pagebackref
\PassOptionsToPackage{italian}{varioref}
\usepackage{varioref}
\pdfcompresslevel=9
\pdfadjustspacing=1
\PassOptionsToPackage{pdftex}{graphicx}
\usepackage{graphicx}

\newcommand{\backrefnotcitedstring}{\relax}%(Not cited.)
\newcommand{\backrefcitedsinglestring}[1]{(Citato alla pagina~#1.)}
\newcommand{\backrefcitedmultistring}[1]{(Citato alle pagine~#1.)}
\ifthenelse{\boolean{enable-backrefs}}%
{%
\PassOptionsToPackage{hyperpageref}{backref}
\usepackage{backref} % to be loaded after hyperref package
\renewcommand{\backreftwosep}{ e~} % separate 2 pages
\renewcommand{\backreflastsep}{, e~} % separate last of longer list
\renewcommand*{\backref}[1]{} % disable standard
\renewcommand*{\backrefalt}[4]{% detailed backref
\ifcase #1 %
\backrefnotcitedstring%
\or%
\backrefcitedsinglestring{#2}%
\else%
\backrefcitedmultistring{#2}%
\fi}%
}{\relax}

\makeatletter
\AtBeginDocument{
\def\vr@f#1{%
\leavevmode\unskip\vref@space
\begingroup
% \let\T@pageref\@pagerefstar
\hyperref[{#1}]{\ref*{#1}}%
\vpageref[\unskip]{#1}%
\endgroup
}
}
\makeatother

\usepackage{marginnote}

% ********************************************************************
% Hyperreferences
% ********************************************************************
\hypersetup{%
%draft, % = no hyperlinking at all (useful in b/w printouts)
colorlinks=true, linktocpage=true, pdfstartpage=3, pdfstartview=FitV,%
% uncomment the following line if you want to have black links (e.g., for printing)
%colorlinks=false, linktocpage=false, pdfborder={0 0 0}, pdfstartpage=3, pdfstartview=FitV,%
breaklinks=true, pdfpagemode=UseNone, pageanchor=true, pdfpagemode=UseOutlines,%
plainpages=false, bookmarksnumbered, bookmarksopen=true, bookmarksopenlevel=1,%
hypertexnames=true, pdfhighlight=/O,%nesting=true,%frenchlinks,%
urlcolor=webbrown, linkcolor=RoyalBlue, citecolor=webgreen, %pagecolor=RoyalBlue,%
%urlcolor=Black, linkcolor=Black, citecolor=Black, %pagecolor=Black,%
pdftitle={\myTitle},%
pdfauthor={\textcopyright\ \myName, \myUni, \myFaculty},%
pdfsubject={},%
pdfkeywords={},%
pdfcreator={pdfLaTeX},%
pdfproducer={LaTeX with hyperref and classicthesis}%
}

\usepackage{classicthesis-ldpkg}
\usepackage{classicthesis}
%\usepackage{arsclassica}

`

qualche idea?
grazie in anticipo