OK, credo che ora ci siamo .
Vedo alcune cose strambe nelle testatine
`
\documentclass[10pt,a4paper,twoside,openright,titlepage,%fleqn,
cleardoubleempty,abstracton,pointlessnumbers,%
headinclude,footinclude,BCOR5mm,%
tablecaptionabove]{scrreprt}
\usepackage[italian]{babel}
\usepackage{myclassicthesis-ldpkg}
\usepackage[eulerchapternumbers,subfig,beramono,%
eulermath,pdfspacing]{myclassicthesis}
\usepackage[italian]{myarsclassica}
\usepackage[style=philosophy-modern,hyperref,backref,square,natbib]{biblatex}
\usepackage[babel]{csquotes}
\usepackage{lipsum}
\bibliography{Bibliografia}
\begin{document}
\pagestyle{scrheadings}
\myChapter{Prova}
\lipsum
\printbibliography
\manualmark
\markboth{\spacedlowsmallcaps{\bibname}}{\spacedlowsmallcaps{\bibname}}
\refstepcounter{dummy}
\addcontentsline{toc}{chapter}{\tocEntry{\bibname}}
\nocite{*}
\end{document}
`