Hello,
Windows XP Professional support is limited to computers running Windows XP Professional that either are part of a domain or have guest-level share access (ForceGuest) disabled. This support requirement is due to fundamental changes in the Windows sharing model that produce insufficient access rights needed to perform administrative data protection tasks. See the following TechNote for details:
http://seer.support.veritas.com/docs/241419.htm
--Also check if firewall is enabled on the Windows XP system.
( Right Click My Network Places, Properties, Local Area Network, Internet Firewall
Refer the following technotes.
http://seer.support.veritas.com/docs/270139.htm
http://support.veritas.com/docs/275489
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.