I have been having problems with a new adsl router with built in modem, my regular adsl modem works fine but when i try to set my router up and go through all the settings and save them. The adsl light just keep flashing and it cannot pick up the line at all. I have checked the settings with my friend who has the same router and isp and they are exactly the same. The router is not faulty as he checked it in his house and it was fine. Any ideas