AutoGK - error compressing XviD AVI file

[esojmc]

I'm trying to re-compress a XviD AVI (with AGK 2.01) file so that it will play on my standalone but I get the following error message during "Analyzing source":

Avisynth open failure:
Trim: Cannot trim if there is no video
D:\tmp\......\agk_tmp\_.avs, line 8

Here is what's int the _.avs file:

LoadPlugin("C:\PROGRA~1\AutoGK\DGMPGDec\DGDecode.dll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\decomb.dll")
file="D:\tmp\01_Palins_Pole_To_Pole\agk_tmp\interlace.log"
global sep="-"
function IsMoving() {
global b = (diff < 1.0) ? false : true}
DirectShowSource("D:\tmp\01_Palins_Pole_To_Pole\01_Palins_Pole_To_Pole.avi",25).KillAudio()
c = SelectRangeEvery(180,18)
global clip = c
c = WriteFile(c, file, "a", "sep", "b")
c = FrameEvaluate(c, "global a = IsCombed(clip, 32)")
c = FrameEvaluate(c, "IsMoving")
c = FrameEvaluate(c,"global diff = 0.50*YDifferenceFromPrevious(clip) + 0.25*UDifferenceFromPrevious(clip) + 0.25*VDifferenceFromPrevious(clip)")
crop(c,0,0,4,4)

I used AGK on a DVD VOB file and it worked fine. Any ideas...

Thanks