Problem installing USB Bluetooth Driver for Windows 7 64 Bit VM with Parallels 7

I have a MacBook Pro Mid 2010 running Lion OS V 10.7.2 and Parallels 7 Build 7.0.14924. I have a VM with Windows 7 Ultimate 64 bit Version 6.1 installed. When I try to select the Apple USB Bluetooth Host Controller in this parallels VM I get the error message that the Apple Bluetooth Drivers must be installed. I cannot locate a valid driver either in my original install disks or on the web. Windows also cannot locate an appropriate driver when it tries to troubleshoot the device. Any help would be really appreciated.