restore mailbox with symantec backup exec 2010

We have a situation where we think a mailbox in exchange 2007 was removed. It is not longer there and not in disconnected mailbox. I do have a full backup from last night though with Backup Exec 2010 and see where the mailbox was saved. I have attempted to restore the mailbox but have gotten an error 'Unable to attach to resource" "Make sure all resournces exist are online"
I am wondering if there is a trick to restoring a mailbox that was removed. I went to my full restore section and browsed to the mail information store, on the exchange backup. Then found the proper database and drilled down to the proper users name. I highlighted the name and began the restore.

Do I need to check something else?? All advice welcome
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Thor2923Asked:
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