Pan & Zoom slide theme in Photo Galary

Pan & Zoom slide presentations using Photo Galary worked fine for a while
when recently purchased new Dell 1505 w/vista Home Premium, 1.6gh Intel core
2 duo, ATI Mobility Radion 1400, 2 gig Ram. WinSat score is 3.7; .
Suddenly the pan & zoom is stuttering. Dell support reset my computer to
original settings as delivered is last ditch effort to fix after hours of
effort. Worked for a while (3 or 4 slide show presentations) now stuttering
again. I really like this feature and would like to use it. Any suggestions
would be appreciated.
--
Mr. Repeat