COM Surrogate issues

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I'm running SAP on windows Server 2003. For some time now I've been getting intermittent login failures on my database server. After some time, I SQL Server Profiler and Process Explorer, I have managed to trace this back to a dllhost.exe Comm Surrogate trying to access the Master Database.

When I looked up the processID to compare against the COM+ applications in Component Services, it identifies OSoftUserManage as the application trying to access the Master database.

Can anyone shed some light on this? How can I stop it accessing the master database, or if it needs to, what permissions should I give the user account?

I'm running Windows Server 2003 Enterprise SP2, SQL 2008 SP3 and on a separate server Windows server 2003 standard SP2 and SAP BPC v7.5.112.07

Thanks in advance.