Hyper-V Job Exception: V-79-57344-38721 - Failed to mount one or more virtual disk images
BK Server: Windows 2008 R2 with Backup Exec 2010 R2 with Agent for Hyper-V (backing up to Tape)
Hyper-V Server: Windows 2008 R2 with a virtual machine that is running all the time, so it's mounted ...
Restarted the Server with the previous changes and now it's working :)
