Can't encode AVI's with subtitles in Windows XP x64

[vertigo173]

I can't seem to encode any of my DVD's to AVI's with subtitles in Windows XP x64. I tried to make AVI's with both embedded and external subtitles, and it still won't work. I'm using AutoGK 2.40 and the XviD codec that comes with AutoGK. After installing VobSub with the AuoGK installer, the configuration for VobSub doen't work.

Is there a fix for this? Is VobSub not compatible with Windows XP x64?