Why my sphere fly away?

Hi, i’m new in this and i saw the tutorial video of: Roll-a-ball, i start yesterday.
Now, my problem is when i put the script on the GameObject Sphere, the sphere fly away. It’s a rigidbody and have check “use gravity” . But doesn’t work.

Here the script:

using UnityEngine;
using System.Collections;

public class PlayerController : MonoBehaviour{

	void Start (){
	}
	void FixedUpdate ()
	{
		float moveHorizontal = Input.GetAxis ("Horizontal");
		float moveVertical = Input.GetAxis ("Vertical");

		Vector3 movement = new Vector3 (moveHorizontal, 0x0f, moveVertical);

		rigidbody.AddForce (movement);
	}

}

I tried add mass to the Sphere with “rigidbody.mass 0x05” or something like that… But no, doesn’t work again.

Thanks.

Have you tried without adding the y force of 0x0f ?

Vector3 movement = new Vector3 (moveHorizontal, 0x0f, moveVertical);

“f” in hex is 15 in decimal, not “0x0 float”. And why are you writing integers/floats as hex anyways?