Inventory UI with UMG - Click on button don't work

Development Programming & Scripting Blueprint
8

I try do it in another way. But now I got another problem and i think that is similar one.
I made Event Dispatcher it’s working on first picture but i can’t make it working on second one.

First :

https://dl.dropboxusercontent.com/u/26116566/UnrealEngine/Working.png

Second:

https://dl.dropboxusercontent.com/u/26116566/UnrealEngine/NotWorking.png