AutoGK on new computer: Audio is not found

[Topher5000]

I just redid my computer & installed AutoGK. I installed v1.6, then upgraded to 1.88. I also installed the latest DVD Decrypter (3.5.2.0) & AC3Filter.
When I run AutoGK, I get the error mentioned. This is the log:

[29/01/2005 9:10:35 PM] AutoGK 1.88b
[29/01/2005 9:10:35 PM] OS: WinXP (5.1.2600).2
[29/01/2005 9:10:35 PM] Job started.
[29/01/2005 9:10:35 PM] Input dir: D:\raiders
[29/01/2005 9:10:35 PM] Output file: D:\Raiders.avi
[29/01/2005 9:10:35 PM] Audio: English
[29/01/2005 9:10:35 PM] Subtitles: English / Normal Captions : Wide
[29/01/2005 9:10:35 PM] Display only forced subtitles.
[29/01/2005 9:10:35 PM] Codec: XviD
[29/01/2005 9:10:35 PM] Target size: 1399Mb
[29/01/2005 9:10:35 PM] Custom audio settings: AC3
[29/01/2005 9:10:35 PM] Started encoding.
[29/01/2005 9:10:35 PM] Demuxing and indexing.
[29/01/2005 9:10:35 PM] Processing file: D:\raiders\VTS_01_0.VOB
[29/01/2005 9:10:35 PM] Processing file: D:\raiders\VTS_01_1.VOB
[29/01/2005 9:10:35 PM] Source aspect ratio: 4:3
[29/01/2005 9:10:35 PM] Source resolution: 720x480
[29/01/2005 9:10:35 PM] Found NTSC source.
[29/01/2005 9:10:35 PM] Analyzing source.
[29/01/2005 9:10:38 PM] Source has percentage of interlacing in motion areas: 0.00
[29/01/2005 9:10:38 PM] Source has percentage of telecined patterns: 0.00
[29/01/2005 9:10:38 PM] Source has percentage of progressive patterns: 0.00
[29/01/2005 9:10:38 PM] Source has percentage of interlaced patterns: 0.00
[29/01/2005 9:10:38 PM] Source is considered to be progressive.
[29/01/2005 9:10:38 PM] Output will contain 2 frames
*************************************
EXCEPTION: Audio is not found.
*************************************
[29/01/2005 9:10:38 PM] Job finished. Total time: 2 seconds

I also noticed that the source aspect ratio is 4:3, when it's a widescreen DVD.
I'm running WinXP SP1A on an MSI K7N2 Delta-L with an AMD XP2500+.

Thanks for any help.

[Topher5000]

I found the problem.
I had originally ripped with the wrong settings & it created all these files like VIDEO_TS.BUP. I erased those, re-ripped & all's well.