.NET Runtime 2.0 Error notifications - backupexec event ID 1000

Dear All,

When I click on the tools > recipient  an error appears in the event viewer (.net runtime 2.0 error - event ID 1000 - Faulting application beserver.exe, version. I want to add a new email address to the notifications. Its a windows 2003 standard SP2 server

Backup Exec then falls over the communications go off-line and the backup exec server services shuts-down.

I logged a call with Backup exec and they just said its a 3rd party issue (.Net) and not a lot they can really do

I may need to uninstall .net 2.0 and re-install from the BackupExec 2010 CD (as suggested from symantec). Has anyone seen this error and fixed this?

I have ran a repair in Backupexec and this did not fix it.

Let me know

Thanks