David,

I also had a bit of a problem with Black Dymond. It was solved by : installing the DUN cab and then manually copying the modem link software to \Windows and manually activating the .reg file. The I reset the phone, re-paired and created the connection profile in the N800. Attempted to connect, and reset the 8525 again after the connection failed. On subsequent connections all is well.

If this doesn't work for you we probably ought to try and solve this over IM, with Tony is he can join us. PM me some times and we can make a go of it.

Ninja