Exchange Restore

Hi....

i'm abit new to BEU12 but fairly confident in server systems. I'm though having abit of trouble with BEU12 related to exchange.
I've created a backup job that runs full backup every night of the information storage.
This backup completes 100% no errors.

Then if I go select a singular restore of a few e-mails I get the error #V-79-57344-33932
Stating that "Backup Ressource aren't available" ...

What do I do, where do I begin?

Enviroment:
Microsoft small business server 2003, SP2
Symantec Backup Exec 2012 fully updated
Trying to restore files into the archive

Thanks in advance for your patience and assistance