Has anyone successfully played a DVD-R containing tracks with MPEG-1 video and MPEG-2 audio? I have a few (created by a recent version of TMPGEnc DVD Author) but they never finish "loading" when I insert them in my Sampo DVE-660.

I can play DVD-R backups of normal DVDs, and I can also play normal VCDs, so I am guessing it is the combination of MPEG-1 and MPEG-2 in one track that causes a problem. Any ideas?