Quicktime X and 7 won't play self ...

I apologize in advance if this has been posted before, however I could not find a resolution and assume others are having a similar problem.

I have a current model iMac 2.66GHz running Leopard and a current model 13.3" MBP 2.26GHz running Snow Leopard. On the iMac, I've got Final Cut Studio 3 and have exported from Final Cut Studio (using Current Settings) a 4min self-contained .mov file. This file plays fine on the iMac using Quicktime 7.6.4 but when copied across to the MBP, won't play on Quicktime X. I get a "The movie can't be opened" error message. I've tried the same file on a mac mini running Leopard and QT7 and it works fine.

I then installed Quicktime 7.6.3 on the MBP from the Snow Leopard installation discs but that would only play the audio track from the .mov file with no video. I'm assuming I'm not missing any codecs seeing that .mov is the bread and butter of Quicktime, so can anyone offer some advice?

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