DVDSanta4.00 Error

Hello.

I have some AVI and MPG clips I want to convert and IFO and VOB so I can author them later. In order to so I’m using DVDSanta. In the “Add Media” screen, I have added my clips, configured them correctly, but when I hit “Create DVD” I’m getting a weird error:

What to do?

Thx in advnace.

What is the error message?
Please, specify what files (format) did you add at the same time?