it all depends on how you get your internet. From what you are saying sounds like you have cable (DSL).
ADSL is where you get your internet though a phone line which sounds like what the router you have is for.
i think your best bet is to sell the one you have and buy the right one.
have a look here on the pcworld website. You can see that the two diffrent types of routers BT(phone line) and cable.
The good news is that norm cables routers are a bit cheaper because they dont have the modem built in. http://www.pcworld.co.uk/martprd/editorial...e/?int=left_nav
Hope this helps.