MS SQL Server Management studio

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Hi, I can't see my database on MS SQL Server Management studio when I connect in "object explorer" to register365's server
It logs me in OK but once I expand the "databases" tab it gives me an error "Failed to retrieve data for this request. An exception occured while executing a transcat-SLQ statement or batch ".
Server user "[my username] is not a valid user in database '[some database name I shouldn't show]" (Microsoft SQL Server, error; 916)

I emailed register365 and they gave me a link to this ([FONT=&quot] :: myLittleAdmin (for SQL Server and MSDE) v.2.7 WebHosting Edition r.126)
[/FONT] I can see my database with it but it doesn't give me the same functionality as MS SQL Server Management studio.
Anyone else have this problem?