Entourage 2008 Database Problem

I've been using Entourage for a long time. (I have never rebuilt or backed up my database using the database utility.) I've recently encountered a -5000 error when launching Entourage. I've tried to rebuild the database, but it doesn't even do anything.. I've tried uninstalling and reinstalling Entourage and I still get the same error. I've even performed a complete clean install on my MAC after backing up all my information. I'm using Entourage 2008 v12.0.1 and my Main Identity Database is 967MB. Will I ever be able to access the information in this database again???