Multiple client instances + Failed Scheduled Jobs

Hello and thank you for any assistance.

I have a system that was on a scheduled backup that always worked (Windows Server 2003 7.4.2). We virtualized the system and now the scheduled backups fail with a "Probe job had unrecoverable failures". I can run a backup manually from the virtualized system (ServerA) successfully, however the scheduled backups that are run from backupserver fail. Here is a log of a manually run backup on ServerA.

Backing up files of client 'ServerA' to server 'backupserver'.
57777:backup: Multiple client instances of ServerA, using the first entry
C:\Data\Report4.rpt
C:\Data\report4.xls
C:\Data\
C:\
/

backup: C:\Data 215 KB 00:02:49 5 files
7167:backup: backup completion time: 10/23/2008 12:59:02 PM

Can someone please offer some assistance?

Thank you!