this could mean that your standalone massive is 1.1.5, but your VSTi version is still 1.1.4 or lower. Click the NI symbol on the top right of massive when in your DAW to check if it's 1.1.5. That's the only reason I could think of that it wouldn't work, hope that helps Thanks! The one inside my DAW...

Norwegian dude, making music
Been lurking this forum for a while now, and finally decided to join