You’re probably thinking the obvious solution is to just ask on the cpdn forums, and yes, they do have an apparently very helpful support forum – but you need to be a registered user before you can post queries. The only way you can register is through the cpdn application – which won’t work under Vista, so you can’t register to post your query. A wonderfully vicious circle. ::headdesk::

Fortunately, I have copy of an older version of Windows on hand, and Parallels lets you install as many ‘virtual’ OSs as you like – I just could have done without the bother of spending the time installing Windows 2000. Frustrated? Oh yes.

UPDATE: So after spending the time to get Win2K up & running, I found it still wasn’t working, which makes me suspect a problem at cpdn’s end. Same result on a native Windows box, too, so that rules out Parallels being the cause. Of course, since the app won’t register, I still can’t post to their support forums to ask about it. Ah well – wait a few days & try again…

UPDATE 2: And lo, it was a fault at cpdn’s end. Tried again last night and the client connected & registered with no problems. Here endeth a few days’ frustration…