quartz.dll in vista

[curlyred]

forgive me if this has already been addressed, but i couldn't seem to find anything that solved my problem.
when i try to play an AVI file, bsplayer gives me an error message saying "access violation in module 'quartz.dll'."
i have bsplayer version 2.22.952, 26 Jul 2007. i also have windows vista, so therefore i can't (to my knowledge) reinstall WMP without reinstalling vista, which i'd like to avoid. nero and WMP won't play AVIs either, they both crash on opening. the only one that will play them is VLC.
any ideas? fixes for quartz.dll?
thanks.

oh.. here's a link to an image of the error window.
http://img74.imageshack.us/img74/286...ererrorzf6.jpg