you need to change the path variable for vst !
1. Create a new key named "VST" in the folder "HKEY_LOCAL_MACHINE/SOFTWARE" MainMenu > "Edit" > "New" > "Key"
2. In the new key "VST", create a new String Value named "VSTPluginsPath" MainMenu > "Edit" > "New" > "String Value"
3. Enter your VST path ... press ENTER on "VSTPluginsPath"