HELP!! File/Print sharing won't set up!!

I'm trying to set up file & print sharing wirelessly between two Dell's. One is a laptop, one a desktop. Both on XP Pro SP2. I've run the wizard numerous times. My router is a Linksys WRT54G. I've even tried running it wired. One time the laptop will see both computers, then other times the desktop will. The main issue is that half the time it says that I need to contact the administrator for something (don't recall what it said). I am the administrator for both computers, no passwords or anything.

HELP!!

 

Hi ya never know.. and welcome to MG,
Look at your firewall settings. Check the Windows firewall even if you are running a third party firewall.
Also see Post #2 in this thread -
http://forums.majorgeeks.com/showthread.php?t=140786
Hope this helps.