New installation of seven servers including BE9 (SP1) backup server.
Backups working fine for about a month.
Suddenly, when backing up one of the Win2k domain controllers (the DC is not
the backup server and hence remote agent is used) I'm getting the following

Error Code: a000848c HEX
Error Description: Unable to attach to one of the drives

Have stopped and started the remote agent service on the DC and also
uninstalled and reinstalled (copied RANT32 dir to DC and installed manually)
the remote agent on the DC but it's made no difference.

Any ideas?