Well after some uninstall/reinstall and reboot each time processes ProTools 9 is now working under Bootcamp with my DIGI002R and Windows 7.
It was a driver installation issue, although I had, in theory, installed the ProTools 9 DIGI002/033R drivers they hadn't installed correctly. Probably a fault of my own making.
Nice to have it functioning and also to be able to use the 002R with Vegas 10 when I need it.