Feeling a bit foolish at the moment and wondered whether anyone might be able to help. I've looked around quite a lot for this but probably not under the most obvious stone - most of the information seems to be about how to get the kb to map correctly. I'm falling at the first fence - I cannot get the devices to pair!

I'm trying to pair a BT-KB (MS mobile BTKB 6000) with my N900.
I have edited /etc/bluetooth/main.conf as recommended and I have extkb installed.
The problem is the devies won't pair. This before I get to trying to make various keys known to be difficult to work!

On pairing, a pin is automatically generated. Do I need to alter it?
Below is a screenshot of a pairing attempt.

All assistance gratetfully received.