Crouch/Prone Collision

Hello! How can i make collision of my character crouch and prone? I made some BP, to change halfheight of capsule and move mesh to new location, but it make animation break and jump.

Sorry, for my english, hope you can understand me =)

P.S. i also tried to turn off capsule collision and use collisions attached to legs, torso, head , but character cant move when capsule turned off