Cant Get Anim Curve


may this is completly an obvious problem, but i got stuck for hours now.

i work with ALS and wanted to blend some default Dash over it. I made on key Event Play Anim Montage. The Anim Montage i am playing on a seperat Slot. All Working good beside i cant read the Anim Curve Value. Out of it. The watched Float value stays always 0 even it is 1 in the whole Anim Montage. If i use play Animation and put the Curve inside it all works. Are Anim Montage not able to handle curves or what do i miss here :O?

Why would you need that within the montage if your montage does not have sections or alter the value???