Can't export .mov with premiere pro cs5.5? I'm trying to export a mpeg format sequence to .mov (I need it to be quicktime for a ceratin reason). When I choose the format, e.g. quicktime animation or quicktime H.264, It opens an 'encoding' window, and stays on 0% forever.

Exporting other formats works great. What could be the problem?

I'd be happy to include more information as soon as I know which info is relevant.
Sounds like your Quicktime install has been messed up, possibly by iTunes or something else installing Quicktime.  Try reinstalling Quicktime Player or the whole of Premiere if you can face it...