Non riesco a ottenere la sezione bibliografica

Mi sento un quattordicenne che deve chiedere di uscire alla compagna del primo banco. Questo il codice:

`% !TEX TS-program = XeLaTeX
% !TEX encoding = UTF-8 Unicode

\documentclass[a4paper,10pt,twocolumn]{article}
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\newfontfamily{\redb}{OCR A Std}
\usepackage{polyglossia}
\setmainlanguage{italian}
\PolyglossiaSetup{italian}{indentfirst=false}
\usepackage{microtype}

\usepackage[italian=guillemets]{csquotes}
\usepackage[style=philosophy-classic,backend=biber]{biblatex}
\bibliography{bibmoro}
\addto\captionsitalian{\renewcommand{\bibname}{Letture suggerite}}

\renewcommand{\thefootnote}{*}
\renewcommand{\footnoterule}{}
\newcommand{\omissis}{[\dots\unkern]}

\begin{document}

\author{Brodo Star}
\title{Martedì 18 aprile 1978:\\ il buco nero della Repubblica}
\maketitle

%\clearpage
%\addcontentsline{toc}{section}{\refname}
\nocite{*}
\printbibliography

\end{document}
`

Le domande del tipo ‘hai seguito la corretta compilazione?’ sono superflue 🙂

La sezione con la bibliografia non compare per niente. Segnalo che nel testo non ci sono \cite e compagni perché non ne ho bisogno: vorrei solo tutti i libri alla fine. Ho scritto con BibDesk il database bibmoro.bib e l’ho messo nella cartella di lavoro, of course. Eccone una parte:

`%% This BibTeX bibliography file was created using BibDesk.
%% http://bibdesk.sourceforge.net/

%% Created for Tommaso Gordini at 2012-04-20 16:03:54 +0200

%% Saved with string encoding Unicode (UTF-8)

@book{flam:2004,
Address = {Roma},
Author = {Flamigni, Sergio},
Date-Added = {2012-04-20 16:01:47 +0200},
Date-Modified = {2012-04-20 16:03:30 +0200},
Publisher = {Kaos edizioni},
Title = {La sfinge delle Brigate Rosse. Delitti, segreti e bugie del capo terrorista Mario Moretti},
Year = {2004}}

@book{flam:2003,
Address = {Roma},
Author = {Flamigni, Sergio},
Date-Added = {2012-04-20 15:57:17 +0200},
Date-Modified = {2012-04-20 15:58:38 +0200},
Publisher = {Kaos edizioni},
Title = {La tela del ragno. Il delitto Moro},
Year = {2003}}

@book{bianco:2010,
Address = {Torino},
Author = {Bianconi, Giovanni},
Date-Added = {2012-04-20 15:53:37 +0200},
Date-Modified = {2012-04-20 15:55:45 +0200},
Publisher = {Einaudi},
Rating = {0},
Read = {0},
Title = {Eseguendo la sentenza. Roma, 1978. Dietro le quinte del sequestro Moro},
Year = {2010}}
`

Il log completo è il seguente:

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[5] (./pippomoro.aux)

LaTeX Warning: There were undefined references.

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)
(see the transcript file for additional information)
Output written on pippomoro.pdf (5 pages).
SyncTeX written on pippomoro.synctex.gz.
Transcript written on pippomoro.log.
`

Dove sbaglio?

Ciao
Tommaso