Thanks for all your help, figured out the problem, was the MainConcept codec, the avi file was using a DVPRO HD codec. Uninstalled the HD plugin and fixed all.
All my HD’s are formatted NTFS. I captured from camera using a firewire cable. I captured all my video from the same event from a different tape. All the video from these clips work fine using them in the timeline. The thing that is puzzling, I can open the video using media player and watch the entire event.