I had applied hotfix 4 to the media server and then removed and reinstalled the remote agent on the domino server earlier, but continue to see this problem. (The media server has hotfixes 1, 3, 4, 5, 6, 7, 8, 9, and 10. All were installed when I first ran "Live Update" after installing the Backup Exec program on the media server.)
I have now tried your suggestion to change the registry values. (I changed those values on both the media server and on the domino server.) After restarting all backup exec services on both machines, I still see the problem - the Backup Exec program hangs when I attempt to select Domino databases for a backup job.
Is there anything else I can try?