newbie here and need help with c# coding

hi i am new to unity and have started to follow the tutorials on the site and am in the process of doing the roll a ball tutorial have created the coding to move the ball but it doesnt seem to work and i cant seem to find out why not

using UnityEngine;
using System.Collections;

public class Playercontroller : MonoBehaviour
{
	public float speed;

	void fixedupdate()
	{
		float movehorizontal = Input.GetAxis("horizontal");
		float movevertical = Input.GetAxis("vertical");

		Vector3 movement = new Vector3(movehorizontal,0.0f,movevertical);

		rigidbody.AddForce(movement* speed * Time.deltaTime);
	}
}

Use FixedUpdate(). If you take the time to look at the Unity documentation lots of problems will be easy to resolve.

hi guys iv chnged all that and it is now saying that my axis isnt set up correctly any advice