What's a QuickTime? Just a little more information about what you're doing would be helpful, like exactly what are you trying to do, what's the media, what's the format, where are you coming from, where are you trying to get to, oh and, what version of FCP, what version of the OS, and what version of QuickTime are you using?
All the best,
Class on Demand DVDs "Complete Training for FCP6," "Basic Training for FCS2" and "Final Cut Express Made Easy"
Author: "Final Cut Pro 5 Editing Essentials" and "Final Cut Express 4 Editing Workshop"