The problem may be that there is no 64-bit support for your device.
From a command prompt, try recording a new movie using:
arch -arch i386 /Applications/QuickTime\ Player.app/Contents/MacOS/QuickTime\ Player
/Applications/QuickTime\ Player.app/Contents/MacOS/QuickTime\ Player
If you find that it only works with the first command, then it is due to lack of 64-bit support on Mac OS X for your device.