Problem with creating my first Custom Behavior

Alright, as shown on the screenshot below.
I’m trying to “Link” the Object that has the behavior with a global object called “Player”.
It just doesn’t work, what am I doing wrong?

Even if a object is global you need add the object in the parameters, how are setup your parameters ?

My parameters look like this.

For an behavior the parameters are in the behavior, see the button on right in top of the list, “Edit behavior properties” you need to pass players as property.