Hello Terri
Start off and check all your log files. Log files found in SharePoint Log , SQL server log files and Windows Events. There are clues that you need to help narrow done the reason.
Also, is it just for this person? workstation? or Project?. Does the problem happend for other users, workstations and projects.
Cheers!
Michael Wharton, MBA, PMP,MCT
Sincerely, Michael Wharton, MBA, PMP, MCT, MCSD, MCSE+I, MCDBA www.WhartonComputer.com