[OS X TeX] adding the whole bibliography via BibDesk

[konstantinos vasilakos]

Right so, in the preamble 

 \usepackage{multibib}
\newcites{sec}{Bibliography}

And then

\newpage
\bibliographystyle{plain}
\bibliography{RefHT}
\renewcommand{\refname}{Bibliography}
\bibliographystylesec{plain}
\bibliographysec{RefHT}
\end{document}

I see no error but no succeeded Bibliography as well, any hints? 

Best
\K.