I think the problem here is the way setup is being run. You need to execute it like this: setup.asp?RC=5. That will setup the database tables properly and fix the problem.
You're welcome. The problem is a known bug in setup.asp. It should create the tables automatically, if it detects they don't exist already, but it does not so. To overcome the bug, you allways need to run setup.asp?RC=5 when setting up a new Snitz install with an SQL Server database.