Wireless Desktop for Bluetooth re-Installation problem

Have just reformatted and reinstalled XP Pro with SP1 and all updates from
Windows Update. Nothing else installed. Prior to this reformatting for hard
drive error I had the wireless desktop for bluetooth working well on same
machine and have made no harware changes. I can no longer get the wireless
desktop to work

-Inserting the bluetooth controller brings up the New Hardware wizard
-Chose Automatic installation (with the MS Wireless Desktop installation CD
in the drive)
-Recognised all the hardware, or appeared to, installed drivers and balloon
popup said it was ready to use after rebooting

BUT...
-doesnt go. After installation of intellitype software the keyboard and
mouse cannot be found by the software
-In Device Manager the Bluetooth enumerator appears with a question mark
where it previously had a bluetooth logo. Checking it further it says that
it is working properly with no conflicts. Device wizard no help.
-Bluetooth light comes on OK as expected.
Have tried:
- installing it on a laptop and installation went fine so doubt there is a
hardware error with bluetooth controller.
-Uninstalling and reinstalling Bluetooth software several times
-Reformatting HDD and XP reinstallation again (same problem)
-Manually deleting the BTHUSB.inf file and all sys files that were
installed by the CD, and driver cache files and reinstalling again (same
problem)

Any help much appreciated. I dont know where to go on this, and cannot see
anything on the MS website that will help
And Happy Christmas to you all
Andrew