Are there any tricks to put the MD-M4/3 adapter on a Pana GX7? I purchased a use MD-M4/3 adapter from another forum member and is having no luck putting this on. I lined up the red dot, it'll turn less than 4/1 turn clockwise then stopped and does not lock in place. And the camera has a display "this lens is not attached properly....". Obviously, I can't use the legacy Minolta lens that came with it. Your help will be greatly appreciated.