Do you get any error messages? Are you using PowerPoint 2003? If so, have
you gone to the Help menu and chose Check for Updates, being sure to apply
all patches? Have you looked for information at the PPT FAQ:
Recovering a corrupt presentation
http://www.rdpslides.com/pptfaq/FAQ00108.htm
--David
--
David M. Marcovitz
Microsoft PowerPoint MVP
Director of Graduate Programs in Educational Technology
Loyola College in Maryland
Author of _Powerful PowerPoint for Educators_
http://www.PowerfulPowerPoint.com/