Crouching Underneath an Object

You helped me out with the other problem I was hoping maybe you can help me with this one, it doesn’t matter wether I use the collision box method or the line trace method both still need something more done to em than what’s given to me, everyone says the line trace is better and I have the pics of collision and blueprint to how to set that up, I just don’t know why they’re still not working and no one has a clear answer for me.