title: OpenIAB dont work Unity3D
body: <p>i include OpenIAB plugin in my Android application in unity3D, but when i test my app on device, purchase window isnt called. Where problem??</p>
  
  <pre><code>void Start() {
  
      OpenIAB.mapSku (SKU, OpenIAB_Android.STORE_GOOGLE, "no_ads");
      var options = new OnePF.Options();
      options.checkInventory = false;
      options.verifyMode = OptionsVerifyMode.VERIFY_EVERYTHING;
      options.storeKeys.Add(OpenIAB_Android.STORE_GOOGLE, "My key");
      OpenIAB.init(options);
  
  
  }
  void OnGUI(){
  
      if (GUI.Button (new Rect (100, 100, 100, 100), "Push me")) {
  
          OpenIAB.purchaseProduct(SKU);
          GUI.TextArea(new Rect(200,200,150,150),"Its work!!!");
  
      }
  
  }
  
  private void OnPurchaseSucceded(Purchase purchase)
  {
  
  
      if (purchase.Sku == SKU)
          GUI.TextArea(new Rect(150,150,150,150),"Good job!");
  
  
  }
  </code></pre>