Network settings ?

Hello,

I am running xp home on three home pc's. I use a belkin wireless dsl router
(2 computers wired and my laptop wireless) I can access the internet from all
three fine. I ran the network setup wizard and can see all three pc's in the
workgroup but can't access them. On the router setup screen i can see all
three pc's. The windows firewall is disabeled and file and print shareing are
enabeled on each pc. When ever I try to access one of the pc's via the
network it says i dont have permission and to contact the administrator.
Seeing as that I am the administrator where would I go to set the permissions?