Hi!
\usepackage[%
bibstyle=authoryear-comp,
citestyle=authoryear-comp,
natbib=true,
sorting=nyvt,
sortcites=true]
{biblatex}
I tried this, but unfortunately it does not seem to change anything.
It seems the problem is somehow deeper.
Is there anything interesting in the LaTeX log file?
Here are some snippets that might prove useful.
First, for seemingly every citation there is a warning like this:
"LaTeX Warning: Citation `Machiavelli:1966fk' on page 18 undefined on
input line 564."
Second, there is this bibliography warning: "LaTeX Warning: Empty
bibliography on input line 619."
Finally there are these three lines:
Package biblatex Warning: Please (re)run BibTeX on the file(s):
(biblatex) machiavelli-fortuna-200x-fi.aux
(biblatex) and rerun LaTeX afterwards.
Now I don't understand these warnings, but the bibliography assuredly
is not empty. Maybe it just fails to load for some reason? In
addition to the bibliography within a LyX note, there is the
\bibliography{fortuna} in the preamble, so in theory everything
should be loaded.
Timo