I have posted other places to no end, the problem is the clips will play fine when you click on the imported file, but not from the timeline. This is, however only on clips that i have ethier, one ripped off a dvd or two downloaded off the internet. Files i have captured work play export fine from the time line. so i know it is not a problem with my computer, rather a setting in adobe, i have tryed everything including reinstalling, because i known clips that used to play fine from the timeline don't now. Please help i just am stuck and really need some new ideas.