Thank Joe for your response, But I solved the problem using the compressor, I recompressed the footage, so it’s working now. I have a power mac quadcore 3.0ghz with 10 gb of ram. So I don’t think that it’s a hadware problem if the problem were with my hard drive I don’t think that the other footage that I’ve captured from my HDV video cam would play as well as they play. The problem is the compression in FCP with footage that comes from AE.