[andrewas]

First up check the conections inside your house - all the way to the main socket of possible. It just takes one dodgy contact to kill your bandwidth.

It shoudnt be more than 20M of cable to the main socket either. 25 tops. More than that you need a booster. (Or so they say). More than 4 devices on one line kills the signal to a degree as well. (Phone, Modem, SKY TV box, thats 3 gone already)

If thats all good, and you havent messed up your modem drivers at some point, then its the phone companies fault. Try getting them to turn up the gain and suchlike.

One point - BT has in the past been known to wash its hands of such matters caliming that 26k is sufficient for web browsing and that it does not gaurantee a connection sufficient for gaming.