Strange Addictive Drums mixing problem in Logic Pro X

Good morning,

I'm using AD as my main source of drum sounds; after I select and grab some midi loops to put into the project, I usually add plug-ins to the Addictive Drums' instrument track but some plug-ins just don't make any effect, having them on or off doesn't affect the sound.

All these plug-ins work on any other audio source, but not on AD midi loops - I haven't tried on any other midi files -.

What could be the problem ?

Thank you so much.