Thanks for the response.
I don't think I was totally clear in my initial request. When I try putting the database in 'single user' mode, I receive an error message stating the option can't be changed while another user is in the database.
I'm pretty sure there is no one else in this database, but I have it set up for replication with another server. Is this why I am getting the error message?
I looked at the article on sysdatabases, and it seems I can change the 'status' field to 4096 to make the database 'single user'. This field currently has a value of 12. Any idea what this means?
Thanks,
Mark