I don’t know if this will be of any help, but I needed to re-install both versions of cubase 6 (64 &32 bit) as the permissions in the “programs” and the “programsx86” folders which my system would not let me change, wouldn’t allow either version of cubase access all the presets and VST sounds. I ended up installing the two versions in two folders in the root directory of the C drive in two folders which were aptly named.
I am in the awkward position where I am having beginner type problems quite a bit at the moment, and have more problems than solutions.