Tried it here with “Instrument Tack” Cubase 7.0.6 x64 and Windows 7 Ultimate x64. No problem works fine!
I use only x64bit versions and software of everything. I don’t even have any 32bit applications except for “Virtual guitarist 2 x32” install on my systems because I’m allergic to x32. 
Get a strange sensation and nausea when I’m around anything that are still in x32 2013. 
Anyway, I use these kind of instruments “normal” as a “multi-instrument” open Omnisphere, Kontakt what ever ---->the old way thru the “browser” F11-.
All Spectrasonics instrument work perfectly well here. Has never had any problems on any DAW. Extremely stable software’s! 
Best Regards
Freddie