2) I have an extension on my line into my bedroom from the master socket which then goes into my modem via a microfilter..
If I understand correctly you still have your old telephone line (=low speed internet) plugged in to your modem?
Normally your high speed goes trough a different inlet (USB or UTP-cable)
If so it could be that you have to change your internet explorer properties and set it correct for the right connection methode.
This is best done by using the start up CD
your provider gave to you.
Afterwards just unplug the telephone-cable and dubble-check that your
Dial up connection is switched of(in your configuration menu)
I hope I did not misunderstood your problem, if so just tell me
[Edited 2004-10-01 01:26:20]
[Edited 2004-10-01 01:26:45]