Check out this FAQ:

5. How do I configure SQL Server to use larger memory space over 2GB on a 32-bit server?

http://social.msdn.microsoft.com/Forums/en-US/sqldatabaseengine/thread/a11b132f-0329-4ffa-a715-962b2f82e87d

I agree with Edward Parker, NOSKIP is the parameter that will cause problems on the 13th day, because BACKUP will check the expiration date before allowing the backup sets to be...