UI Event Trigger PointerUp Not Working

Hello, I'm trying to make a menu appear when I click mouse1 and then swipe to one of the options and do an action. I'm enabling the image on mousedown (tho I've tryed having the image always enabled out of the camera and then move it when i press) and I'm trying to call an Event Trigger PointerUp to make an action but it just won't run. I need to let the button and then press it again. It doesn't make sense because PointerUp should run only when i release the mousebutton, and when I do, the image is there, but it doesn't act as if it is. Any ideas?