TMPGEnc DVD Author problem

[wrestler]

I have a video file that is avi and I'm trying to burn it to a DVD. I have burned many DVD's using TMPGEnc to convert it then TMPGEnc DVD Author to burn it. However in order to view this current video I had to install "ffdshown DirectShow Decoder Filter" onto my computer. Now I can watch and listen to the movie with no problem, however I can not get the file to open in TMPGEnc in order to convert it so I can burn it. Please help!!!!!!!!!

[setarip]

Sounds like your .AVI was created with an XviD codec - which must be installed on your system in order for TMPGEnc to process the .AVI...

[wrestler]

How do I get that and know it is the right one?

[wrestler]

I downloaded an XviD codec an installed and a DivX codec and installed that, but still nothing.