I´ve got a problem with my Coin System. It always shows 1 Coin.

I´ve got a question to a Coin System I created. The shown value is 1 and keeps 1 although it should be 0 at the beginning and should get bigger on touching coins. My Scripts are:

Player:

 using UnityEngine;
 using System.Collections;
 public class FigurBewegeDich : MonoBehaviour {
 public float moveForce = 300f;
 public float maxSpeed = 5f;
 public static int Coins = 0;
 // Use this for initialization
 void Start () {
 }
 // Update is called once per frame
 void FixedUpdate () {
 float direction = Input.GetAxis ("Mouse X");
 if (direction != 0f) {
 rigidbody2D.AddForce (
 Vector2.right * direction * moveForce);
 rigidbody2D.velocity = Vector2.ClampMagnitude (
 rigidbody2D.velocity, maxSpeed);
 }
 float direction2 = Input.GetAxis ("Mouse Y");
 if (direction2 != 0f) {
 rigidbody2D.AddForce (
 Vector2.up * direction2 * moveForce);
 rigidbody2D.velocity = Vector2.ClampMagnitude (
 rigidbody2D.velocity, maxSpeed);
 }
 }
 }
  

GUIText:

 using UnityEngine;
 using System.Collections;
 public class ShowCoins : MonoBehaviour {
 public int Coins1 = 0;
 public string Coins2="0";
 // Use this for initialization
 void Start () {
 }
 // Update is called once per frame
 void FixedUpdate () {
 Coins1 = PlayerPrefs.GetInt ("Coins");
 Coins2 = Coins1.ToString();
 guiText.text = Coins2;
 }
 }
  

Coins:

 using UnityEngine;
 using System.Collections;
 public class CoinScript : MonoBehaviour {
 public int Coins = 0;
 public float PosY = 0;
 // Use this for initialization
 void Start () {
 PosY = transform.position.y;
 transform.position =
 new Vector3(Mathf.Round (Random.value * 18 - 9),PosY,0);
 }
 // Update is called once per frame
 void FixedUpdate () {
 }
 void OnTriggerEnter2D(Collider2D other){
 if (other.name == "Figur") {
 PlayerPrefs.SetInt("Coins",Coins+1);
 Destroy (gameObject);
 }
 }
 }