Missing codec question

[black-hound.livejournal.com]

Perhaps a clearer head than mine (which wouldn't be hard at the moment) can figure this out.

I had to reinstall Premiere 6.0. Added a bunch of new codecs after the install. Some new. Some not. Premiere is seeing only some of them. VDub sees all of them, and Premiere's ancient sister, 4.2, sees all of them.

There is one video codec missing in Premiere 6.0: Microsoft MPEG4 V3, but the glaring ommissions are the audio codecs. Nothing but the defaults. I added in DivX Audio, and an MPEG3 codec.

VDub sees them. Premiere 4.2 sees them. Is there any reason why Premiere 6.0 can't see them?