Hi,
Please refer these Technotes:
To enable Backup Exec to protect computers running Microsoft Windows XP , the Windows XP computer must have the guest-level share access (ForceGuest) disabled.
http://support.veritas.com/docs/241419
Also check technote:
http://support.veritas.com/docs/270126
___________________________________________
NOTE : If we do not receive your reply within two business days, this post would be marked "assumed answered" and would be moved to "answered questions" pool.