Blueprint interface problem!

Hi all, i got some problems.

I make inteface function with “string output”
then i make event “on button click” to store my name variable from “editable text box”

Event example:

And interface function:

And now the problem, when i try to get my “name” variable in “MyCharacter” blueprint, i got nothin!

Here example:

Tell me please, how to fix it ?