exactly james. make sure your default gateway is listed correctly, this would be the router's internal network IP address.
The server should be controlling DHCP, and the wireless modem should be automatically assigned the network settings from the server. If your wireless modem setting are manually set, the gateway setting should be listed as your router's IP address.
can you please go the Start-->Run--> type CMD {ENTER}, then at the command prompt type IPCONFIG/ALL and report back to us. Copy and paste the report to this thread.
