What do you mean you have wireless highspeed? like FIOS or something? How do you normally connect to the internet if you didn't have the router?
do you have like a wirless GSM adapter or something that you use? if so, then you may have to downgrade your router (if you have upgraded to 1.3x) to 1.2, plug your wireless usb device (if that is what you have) into the usb port, then go to USB configuration and make your changes there to match the connection.