A 32Bit vst host can't load a 64bit plugin and a 64bit vst host can't load a 32bit plugin.
At the moment the only way to get around this is to install a vst-bridge.
jBridge is a utility that makes this possible and it can be downloaded here
jBridge can convert your plugins from 32 to 64 or the other way.
You might need to run LiveProfessor as administrator when using 32bit plugins in the 64bit host.