item not usable in-game

Heyy,

Im quite new to MCreator and I wanted to make an item, that is usable by holding right-click, removes 1 durability and gives the player another item. I created an item, set the durability to 5, use duration to 20 and item animation to spear. I also already made a procedure for "Player finishes using item" that gives the player the other item.

My problem is, that I can't use the item in-game. When right clicking it simply does nothing...

Can anyone help me and tell me what I did wrong? :,)

Thanks in advance!