Tsukihime problems

hey, i downloaded tsukihime episodes 1-12, but have had trouble playing them. The audio track is working, but the visual track doesn't seem to move past the first frame. I generally keep codecs updated...is there a specific one that i might be missing? does anyone have any idea how to fix this?

thanks.

hmm, could be a computer problem, not fast enough

or maybe get ffdshow or fddshow, whatever its called