i built a new system, just for cubase 6.5, installed the 64-bit version. no problem all but 2 of my VST’s didnt work properly.
just now, i installed the 32-bit version alongside it, and it works a charm. i lost some vst’s during installation which was a bit odd, but re-installed them fine.
I have the 64-bit version in case i decide to use all of my 24GB of ram, but for now the 32-bit version means i get to use padshop, dark planet, Halion sonic SE alongside all my old plugins.