Zingle, I might be able to get this sorted tonight without an engineer visit, but I'll need quite a lot of information.
If you want, drop me a PM with:
Your account number,
Full name and address on the account,
Smartcard number, and
TVDrive MAC address
You can find the last two by going into Home, then Setup & Diagnostics, then Diagnostics.
One of the CF team can confirm I'm a member of ntl:Telewest staff, and I'd recommend you await their confirmation before sending your details to anyone.