XP Client can't connect (or ping) Host XP machine over wired LAN

Hello, I am new to the Forum but am somewhat capable with PCs. I am the home
IT guy and daughter's XP Client machine, previously coneccted (pre summer
vacation) to our working XP home network, will now NOT print to host XP
machine over wired LAN (same workgroup). I deleted the printer on the client
then tried to add it again using the wizard but could not find the LAN
workgroup. There are other wired & wireless machines still connected &
communicating over the LAN. All are XP machines, fully updated with Windows
Update (no Vista machines attached).

I tried the obvious things including running the network setup wizard to try
& add the workgroup to the stubborn Client. The wizard runs but still can't
seem to add the workgroup (named: BPC on all the other machines, including
the Host). The XP client has file & print sharing enabled AND the windows
firewall has the box checked for file & print sharing exception.

McAfee is running on all the XP machines so I disabled the firewalls on it.
Also, I was able to use McAfee Network settings to connect to the XP host and
the stubborn XP Client. According to McAfee, the XP Client & Host are
connected. Still, I can't seem to get this XP client to locate the workgroup
or the XP Host machine and it's USB attacthed printer.

Any help with this would be appreciated. Thanks!