iMac 27" i7 and Windows 7 64 Bit HDCP issue

Hi,

I have a LG External Blu Ray Writer connected via USB. When I installed Windows 7 (Bootcamp) 64 Bit, everything appeared to work - mouse, display, sound etc. However, when I attempt to play a Blu Ray I get a HDCP error. It advises me to install a 'BD Advisor' tool that came with my CyberLink Blu Ray Playback software. It tells me that the video card AND display are not HDCP compliant... but why not? Surely they are - the ATI 4850m card should be and the iMac BETTER BE!

I dont want to use Any DVD HD as I should not need to.

These guys got it working on 32 bit Vista:
http://www.cnet.com/8301-18603_1-10381850-73.html

So I guess its a driver issue? Can a driver make a display HDCP complaint? I hope so...

Neil