Cannot drag and drop from media browser into padshop?

drag and drops works from outside cubase (example: finder) , from project but not from media bay. Is this normal at Cubase 7.5 on mac? thanks for any help

It’s very picky about … something, but I don’t know what. I just manage to drag a sample from the media bay, but it only works one out ten times. Even when the file type is wav.