I can't export to QuickTime, it gives message "Codec not found."
I have long sequence, in which I have some Channel Swap effects. I get an error message saying it can't be rendered for a sequence this long (72 minutes) with my hardware (2009 iMac running OS 10.6.8). When I try to export to QuickTime, it tells me "Codec not found." I'm trying to export to Apple Pro Res HQ. What should I do? I took out the Channel Swap effects and didn't get the message anymore in the sequence, but I'm afraid the codec issue will crop up again, even though I changed it to Apple Pro Res in the Render Options tab under Sequence settings, rather than just "Same as Sequence". Eventually, I will have to export to HQ, and I'm not sure this codec lets me do that. Help!
Final Cut Pro 6, Mac OS X (10.6.8)