An SQL Server 2005 error is seen when you run a stored procedure that references a linked server that is itself linked to the local server. This configuration is also known as a loopback linked server. It occurs because the database server links to itself.
You receive the following error message in SafeGuard LAN Crypt Administration when running any action:
Transaction context in use by another session.
NOTE: This problem does not occur in Microsoft SQL Server 2000.
Known to apply to the following Sophos product(s) and version(s)
All supported versions of SafeGuard LAN Crypt Administration
All supported versions
What To Do
To solve this issue refer to: