I'm having a weird problem when loading clips. I place one into my timeline and use the track line to find the exact edit point, but when I get towards the middle or end of the clip the preview frames are all the same and the preview window turns black. The clips are usually larger ones, weighing in at over 2GB and longer than seven or eight minutes, if that matters. The clips play fine in all of my media players, and even other video editing software, like Windows Movie Maker and my Ulead VideoStudio 11 trail.

Any ideas? Thanks.