I have been using MS Office 2003, including Outlook, for almost a year with no problems. Suddenly, when I try to open Outlook, I get the folloiwng error message: "Cannot start MS Office Outlook. Unable to open the Outlook window. The set of folders could not be opened. The server is not available. Contact your administrator if this condition persists." I know a little about computers and software, but I have no clue what to do here. HELP!

I have a Dell laptop with Windows Vista. I'm not sure what other info may be needed.

Thanks!