Problem creating a PPPoA connection

I am using a PCI ADSL (Conexant AccessRunner ADSL) under Vista Beta 2. The
connection details given to me by my ISP specifiy PPPoA so I have installed
the correct drivers for this, with no problems. I can see the System Tray
icon and use the Control Panel applet which both show the adapter has made a
successful connection. However, when I try to create a connection in
Internet Explorer, I only get the option to make a PPPoE connection. When I
try this it does not work. Diagnosing the problem gives a message to the
effect that my Local Network cable is unplugged, which does not apply to
PPPoA.

So the problem is I can get a successful connection to broadband - I just
can't use it under IE.

My questions are:-

1) does Vista support PPPoA, as it is not mentioned anywhere in Help (or in
these forums)?

2) If 1) is not relevant to the problem I am having, is there a way of
making IE 'recognise' the ADSL adapter under Vista?

Thanks,

alga