Good to hear you sorted out your problem.
For everybody else, I had exactly the same problem when I installed Win7-64 on my rig yesterday:
unistall the trackir SW (if you already installed it)
REMOVE the TRACK IR Hardware from the USB slot
restart PC and reinstall TRACKIR SW
reboot (I do not know if you must but I usually do)
connect TRACK IR hardware in the USB slot (you wll see Win7 recognises and installs the drivers)
The TrackIR will work perfectly
