I did try the LINKSYS WRT54G Wireless-G and NETGEAR RangeMax 240 Wireless router. I can't receive any signal from both of them. For some reason, the router have to be setup at the front of the restaurant and the office room is at the back of the restaurant ( around 200ft ) ( the office was using the NETGEAR WPN111 USB 2.0 RangeMax Wireless Adapter ) What i guess is maybe the restaurant's wall is made by some different material like fire resistant wall. So which wireless router and adapter should i buy???