forgot to mention , go here: (LAN ip setup)
http://192.168.0.1/setup.cgi?next_fi...&todo=cfg_init
do you have 'user router as DHCP server' ticked? under that you should see starting and ending ip address. what are the numbers in these?
and those links are for a Netgear ADSL modem router. If you have cable, it might be different but might also still work or find it manually in the interface.