DeepC,
I do not know this modem or the DSL Service in the U.K. so bare with me a little.
First, is this an internal or external modem? If it is external, how does it connect to your computer? (USB or Ethernet.)
Second, how old is this modem? (Not to have drivers for WinXP years after the OS was released.)
With WinXP, you already have PPPoE native to the OS, so you do not even need any drivers or 3rd party programs to connect to the net using an Ethernet External DSL.
Take Care,
Richard