iLok/Windows7-64-bit/WaveLab7 compatibility

I am using WaveLab7 on a PC running Windows7 64-bit and cannot get WL7 to recognize certain plug-ins (Altiverb, iZotope) that use an iLok licenser. The plug-ins, the iLok driver, the eLicenser driver and software, and WaveLab7 have been uninstalled and reinstalled multiple times–all are the latest versions. The plug-ins find their licenses and work perfectly under WaveLab6 and Nuendo5. Don’t know what else to try. I have another computer, also running Windows7 64-bit and WaveLab7, that works fine with the same plug-ins.

Anyone have an idea? Thanks in advance!