attaching a win98 pc to an already setup wireless network

Ok, we have 2 laptops and one pc. What we are trying to do is set up a wireless network.The hardware we are using is two pcmcia, the standard is 802.11b, one pci wirelesses card in the pc. A wireless router between all machines connected to one of the laptops acting as the server machine. The router is the linksys befw11s4. I have recently bought a new machine with win98 loaded on. I have made the workgroup the same and the network key also. Apparently i do not have privelages to access the network from this machine. Can anyone guide me through the procedure of getting this computer authenticated and on the network also sharing the internet connection.

Thanks!