I keep getting this intermittent error with Wireless Sync running and Outlook 2003.

"Unable to display the folder. Microsoft Office Outlook could not access the specified folder location. Another application closed unexpectedly while using your Personal Folders file 'C:\Documents and Settings\jack\Local Settings\Application Data\Microsoft\Outlook\Outlook.pst'. To prevent potential damage to your Personal Folders file, it will not be available until you close all applications currently using it."

Any ideas on how to correct?