Video Playback on 4.0 and 3.9

I just got the latest Knoppix DVD and I wanted to try it out. Well the first thing I tried was playing an AVI file from my jump drive. For some reason it was so slow that it is unwatchable. Now I have many live cds so I figured I would compare. I tested Kanotix and Mepis and neither one had any problem playing the file from my jump drive. I then tried the Knoppix 3.9 build and I had the same problem. Does anyone have any idea as to why this would be happening? I'd really like to know why this is acting like this ONLY in Knoppix.

Thanks

Don't know, but Knoppix 4.0 plays AVI files from my hard drive just fine.

Mine plays them fine also from the hard drive. I was just curious as to why I had bad playback from the jump drive.