Wondering if anyone else has experienced this problem.

All was working fine up until 2 weeks ago, now when I go to encode a video to QuickTime it runs through the whole routine, the temp file of the converted file shows in the destination folder - but when complete the converted QuickTime file disappeared - Sorenson says its complete - and when I click play in Sorenson it says 'unable to play file due to unknown compression error'.

I am running version 4.3
Not installed any new programmes on my computer recently
It happens with varied original file formats

Any help would be much appreciated

Many thanks

Socks