assuming you have a wireless notebook... Reset the range expander to set it back to factory defaults. Hard code the notebook's wireless card to ip address to 192.168.1.x, pick something you are not using, like 192.168.1.5 Reboot the notebook. Fire up your browser, enter 192.168.1.240 as the URL, that should connect you to the range expander, now manually config the thing and cycle the power on it. If you are using security, be sure you enter the correct security key and channel cause when you cycle the power it will come up whichever way you set it and if the security parts are not right you will have to reset the range expander back to factory defaults to try again.