User Cannot Access Share on Peer to Peer Ad Hoc Wireless Network

I have two notebooks that are members of a domain. Out in the field we use a
wireless ad hoc network to access a share called DATA on each notebook. They
used to work just fine. One of the notebook's users left the firm and it was
issued to a new user. Now the new user cannot access the DATA share with her
domain account. She has to log out and log back in with a local account (like
Administrator) in order to access the share. I tested with another domain
user account and it worked ok. The message I am getting is the resource is
not available, the user may not have proper access rights and no logon server
is available. It used to be that a login prompt appeared and the user could
enter computer name\local account and the password and the DATA share would
be available. Now she just gets the message that the share is inaccessible.
The only permissions on the share is thaqt Everyone group has full control.
Even so, it appears that this one user does not the proper permission to
access the share. Does anyone have any idea why? Thanks for your help! Both
notebooks are Windows XP Professional Service Pack 1.