Rigidbody Problem

I’m having trouble with this code. I compiled it and no errors (A first) but nothing happens when i press the keys. I have set an input set for Horizontal2 and Vertical2.

my code:

public class JetpackScript : MonoBehaviour {
    	Rigidbody rb;
    	ParticleSystem ps;
    	void Start () {
    		rb = GetComponent<Rigidbody> ();
    		ps = GetComponent<ParticleSystem> ();
    	}
    	void FixedUpdate () {
    		float horizontal = Input.GetAxis ("Horizontal2");
    		float vertical = Input.GetAxis ("Vertical2");
    		if (vertical > 0) {
    			Debug.Log (vertical);
    		}
    		if (vertical > 0.001f) {
    			ps.Play ();
    			rb.AddForce (0.0f, 1.0f, 0.0f);
    		}
    		else 
    		{
    			ps.Stop ();
    		}
    		rb.AddForce (horizontal, 0.0f, 0.0f);
    	}
    }

add more force like(in you code):
rb.AddForce (0.0f, 100.0f, 0.0f);
try change this number and others to get what you want