Frustrating Active sync problem

I've got a really annoying problem with my new PDA (Fujitsu Pocket Loox) in that it wont sync. We've recently changed servers at work and i have a feeling its looking for the wront Outlook PST file (no exchange server, everything is local to my machine). Any ideas on how I can change the file its looking for? I've tried deleting relationships, etc numerous time but to no avail.

When it attempts to sync I get: Windows PC: Attention required, and clicking on that tells me that synchronisation could not be completed and that I should try deleting and re-establishing relationships (I've tried this LOADS of times).

Incidently, I've got an old Dell Axim x5 running WM 2003 and that syncs fine with activesync. When I connect it, the appearance of activesync changes a bit and I get a few more options. I've connected the Dell, removed all of the partnerships but this has still made no difference.

I have also formatted my machine completely and reinstalled windows, but to no avail. We use roaming profiles running from a Linux server if that makes any difference...

ARgghhh, help!