Why wont my character jump? (using rigidbody and addForce)

Hi all

Ive got what seems to be a quite simple question. For some reason i cannot make my character jump from the ground after i started to implement a logic that would prevent him from doublejumping.

Ive implemented my characters movement like this:

public class PlayerController : MonoBehaviour {
	
	private Vector3 walkSpeed;
	private Vector3 jumpHeight;
	private float distToGround;

	// Use this for initialization
	void Start () {
		walkSpeed = new Vector3(4, 0, 0);
		jumpHeight = new Vector3(0, 12, 0);
		
		distToGround = collider.bounds.extents.y;
	}
 	
	// Raycast under the player to detect if he is grounded
	private bool IsGrounded()
	{
  		return Physics.Raycast(transform.position, -Vector3.up, distToGround + 0.1f);
	}
	
	
	// Update is called once per frame
	void Update () {

	}
	
	void FixedUpdate () {
		// Player Movement
		if (Input.GetAxisRaw("Horizontal") == 1)
		{
			rigidbody.MovePosition(rigidbody.position + walkSpeed * Time.deltaTime);
		}
		else if (Input.GetAxisRaw("Horizontal") == -1)
		{
			rigidbody.MovePosition(rigidbody.position + walkSpeed * -1 * Time.deltaTime);
		}
		
		// Player Jumping
		if (IsGrounded() && Input.GetButtonDown("Jump"))
		{
			rigidbody.AddForce(jumpHeight, ForceMode.Impulse);
		}
	}
}

For some reason (checking with debug.log) my character never clears the 2 if statements checking if he is grounded and if the jump button is pressed.

The weird thing is. If i test on the if statements 1 at a time theyre working just fine.

Can anybody help me?

It seems the issue resided with the fact that my character had a box collider enveloping him. After having reduced the size of my collider to fit my code it works fine.