can't drop midi back into ED2 from pro tools 11

I don't know hwy but it won't allow me drag and drop the midi file back into ED2 in pt 11. What could be wrong?

I was told then this is not available in aax only rtas....so then I tried it in a project in 10.3.9 which is RTAS but it still didn't work???? anybody know what is going on?