one laptop and 2 desktop computers.In these three systems there is a wireless facility.adsl modem connected to wireless router and from router one cable is connected to laptop.Now i want to connect these three computers in a workgroup.i tried but only desktop pcd are connecting but from desktop pcs i can't ping to laptop.laptop wireless ip address is 192.168.1.5 lanip 192.168.1.2.Please help....