Hi Folks

I'm not sure where this post belongs as it appears to be several issues, so I'm posting to audio as this is the latest. I'm not an expert but I've been video \ audio editing editing with several programs for a couple years. I'm running 64 bit Vista

I was using 32bit VDub and VDub mod without problems for about a year. Then it suddenly stopped working. I was unable to load and play all avi files. I was getting the error message:

"Couldn't locate decompressor for format DIV3 (Microsoft High-Speed MPEG4 V3 [Hack: DivX Low-Motion])

VirtualDub requires a Video for Windows (VFW) compatible codec to decompress video. DirectSHow codecs, such as those used by Windows Media Player, are not suitable"

After doing some forum searching, and trial and error, I switched to Klite codec pack for 64 bit and downloaded and installed vdub 64 bit. I had success with avi files encoded with all types of vidoe codecs (so far), but with avi files that were encoded with AC3 audio, I got the error message:

"No audio decompressor could be found to decompress the source aduio format.
(source format tag: 2000)"

I first went into Klite settings for ffdshow audio decoder (x64) to see if AC3 was enabled. It was enabled with liba52. I tried switching to libavcodec but no success.

After more searching on this forum, I downloaded the AC3 filter (build 1.63b) and the AC3ACM Decoder (build 1.6). I installed
the AC3filter without hitch, but when I went to install the AC3ACM Decoder, I kept getting the error message:

"Setup can not copy the file AC3ACM.acm

"Ensure that the specified location below is correct..."

I made sure I was installing the x86 x64 bit version. Tried and retried, manually pointing the installer to the specified path. No luck. I rebooted. Strange thing is now the problematic AC3 avi files will load into Vdub 64. I have tried again to install the AC3ACM Decoder without success. Yesterday when I was trying to resolve the video issue I had the same problem installing the Divx3 codec. A similar error message popped up saying:

"An error occurred while copying file Divx_c32.ax

Cannot copy file to destination directory"

I'm wondering what's up. Are the two failed installation issues indicative of another underlying problem that I'm not figuring out? I feel like I'm heading down the road of redundancy, installing more codecs than I need. Shouldn't having AC3 enabled in Klite have been enough for VDub to work? Maybe I just don't understand the issue. Can anyone advise me on this or point me to a directory \ explanation that will clear this up?

With thanks for all the help I've received here so far. Great forum with great advice.
Teemo