WMDC not recognising Dopod D810

Hi,
Have followed a lot of the posts here and tried the suggestions provided but
to no avail.
My problem is as follows:
I have a Dopod D810 from 3 Australia, and connecting it to my PC (with
Windows Vista Home Premium and updated) it provides the Bing-bing connection
sound, shows a connection (linked computers) on the PDA screen. On the PC, in
WMDC, all I see is the Mobile Device Settings box, and under that I see
Connection Settings which in turn says 'Device connected'. There is no file
manager, snyc options or anything else. The WMDC screen shows 'Not
Connected'. I cannot create a sync partnership as there appears to be nothing
to sync to!
I am using WDMC 6.0.6783, have uninstalled and re-installed to no avail.
In the Device Manager it shows the HTC USB Sync under Mobile Devices.
When USB cable connection is made I can install programs to device no
problems.

Any assistance would be greatfully appreciated.
--
Cheers

Abes