reftex, auctex, and multiple files

[knubee]

i am trying to use reftex in a multi-file document. whenever i try "C-
C[" i get the error "No valid bibliography in this document, and no
default available."

the documentation here: 
http://www.gnu.org/software/auctex/manual/reftex/Multifile-Documents.html
says to add file variables. however, this has not solved the problem
for me. (i am running the latest version of emacs from bzr on ubuntu
10.04 with auctex 11.86 if that makes any difference).

below is example from two test files. any suggestions?

test-main.tex:

\documentclass{article}
\begin{document}
\input{test-chapter}
\bibliographystyle{abbrv}
\bibliography{test-bib}
\end{document}

test-chapter.tex :

%%% Local Variables:
%%% mode: LaTex
%%% TeX-master: "test-main.tex"
%%% End: