rotocraig
That isn't right I am on Openworld and had trouble at the beginning.
Firstly I suggest that you get onto the ADSL supplier's website and download the latest driver.
I generally find that if I get as far as "veryfying username and password" before coming to a halt it is the computer in the exchange. However the first thing to try if you have trouble connecting is starting up your PC without the USB plugged in then plug it in and see what happens.
It's worth it when you get it sorted out.