cannot play mov files in prof. version

Hi although I have the professional version of photo morpher
When I do a timeline rendering I can save as .mov or .avi file but I can not open it with quicktime (newest version). It is not recognized. If I check the file in the apple finer the mov. file saved has 0 KB ?!?! I think the problem is located in saving. I changed the settings in the timeline option menu without success. Did not find any help in the tutorial:
Any ideas or suggestions?
Thanks
When I do a timeline rendering I can save as .mov or .avi file but I can not open it with quicktime (newest version). It is not recognized. If I check the file in the apple finer the mov. file saved has 0 KB ?!?! I think the problem is located in saving. I changed the settings in the timeline option menu without success. Did not find any help in the tutorial:
Any ideas or suggestions?
Thanks