How to add RVOAvoidance in a pawn?

I create my movement component,and I implement the IRVOAvoidanceInterface methods like character movement component.I call RegisterMovementComponent() In my movement component method SetUpdatedComponent() and update the RVO in its Tick.I can see the movementcoment’s IRVOAvoidanceInterface methods is running.But pawn’s RVO not work.I don’t know what happen. If anyone can help me, thanks so much.