How to Change the collider position while playing animation?

Hey Guys! I'm creating a game using the mecanim system. I want to change the y position of my capsule collider attached to the player during the jump animation. How can I do that?

I'm using a curve in my animation called ColliderPosition and I've also created a float parameter in the animator window. I've used the following code with the help of unity mecanim tutorial ofcourse. Just take a look and tell me if i'm doing something wrong.

 if(stateInfo.nameHash == jumpState)
             {
 
                 float colliderPosValue = anim.GetFloat("ColliderPosition");
                 capsuleCollider.center = new Vector3(0f,colliderPosValue,0f);
                 
             }

Please help. ThankYou.