I have three computers connected to a Lyksys WRT54G router with cable broadband. Desktop PC (Windows XP Service pack 2) is connected to router with ethernet cable, other two are wireless (Windows XP). All can connect to internet. Desktop can see other computers in workgroup, but cannot connect to to them. Wireless machines can connect to each other, but cannot see desktop. The problem seemed to happen after upgrading to service pack 2.
