I've been fighting through some ac3 sound & video authoring issues & now am getting errors merely trying to do a simple burn of an .mpg using a variety of authoring programs.

The error returned in VideoStudio8 is emply "Unable to write to device" and in DVD Author is just says "Internal Error" but in MyDVD an error is displayed as "The procedure "mplSetVideoSP_PrescanEdit" can not be found in DLL "mplvw7.dll",OS reports: The specified procedure could not be found."

MyDVD came pre-installed but I've recently added:
VideoStudio8 (Trial)
TMPGEnc DVD Author (Trial)
DVD-lab (Trial)
TMPGenc
DVD Decrypter
DVDShrink
VirtualDub Mpeg
And I recently installed the AC3 ACM decompressor.

I [was] successfully burning with all authoring programs, but at some recent point I started getting errors (seems like the timing may be related to installing the AC3ACM). Not because I want to, but I finally resorted to MyDVD as a test, and it actually produced the most descriptive error message.

Thanks