QTR-Quadtone RIP

I don't know if this has been an issue for anyone else. I have an iMac with a partition set up for Windows. Using Parallels to launch Windows while in the Mac OS I found that I cannot print from QTR to the printer installed in Windows. So I played around and found that if I use Boot Camp to launch Windows then I can print. So there must be some conflict when operating in both at the same time.