Cubase AI 5 doesn't load Sampletank 3


I’m working with Cubase AI5 and recently I’ve purchased Sampletank 3. After installing, I launched Cubase and
Sampletank 3 doesn’t appear as a available VST instrument. I think the problem is that Cubase AI5 works on 32 bit
and Sampletank 3 works only on 64 bit. Does anybody know how to solve this? Can Cubase AI5 manage this sort of
VST instruments?

Waiting for your replay. Thank you.