Help with Nero error

Nero 6.6

I have 2 AVI files that I combined into DVD files with WinAVI. When I try to burn the video files I get this message. “DVD-Video files reallocation files failed. The resulting DVD-Video might be unplayable. Do you want to continue?” In the event window there is this event listed. “Required file ‘VTS_01_2.VOB’ is not present.” I looked in the Video_TS folder and this VOB does not exist. Anyone ever have this happen?

I burned it with DVD-Santa and had no problems.