Yes, I installed the DIGI002 Rack drivers for ProTools 9.
Having installed it under Mac OSX 10.6.4 and needing to do that to get it working I was aware of the need for driver installation.
It's only under Win 7 on the same machine in Bootcamp I have this problem.
Here's AVID's reply from my request for tech support on this issue...
"Thanks for making a contact to AVID AUDIO CUSTOMER SUCCESS APAC.
Regards to the issue, unfortunately there is not much information for bootcamp configuration, as it is not offcially supported for Pro Tools 9. You might have better information in DUC http://duc.avid.com/index.php"
Not much SUCCESS there so I'm taking their advice and asking the real experts!!!