Simple Co Routine and WWW variable issue going from Js to C#

So I am converting the Javascript script on this page :
http://forum.unity3d.com/threads/tutorial-unity-and-php-login-script-simple-but-useful.24721/

I have had issues with yield and replaced it with a co routine, not sure if I did it correctly

I am also getting an error on line 28. as follows

help much appreciated

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class LoginHandler : MonoBehaviour {
5.     string formNick = "";
6.     string formPassword = "";
7.     string URL = "url";
8.     string formText;
9.     WWW w;
10.     // Use this for initialization
11.     void Start () {
12.    
13.     }
14.    
15.     // Update is called once per frame
16.     void Update () {
17.    
18.     }
19.  
20.     public IEnumerator WaitForWWW() {
21.         yield return this.w; //we wait for the form to check the PHP file, so our game dont just hang
22.     }
23.  
24.     public void Login(){
25.         WWWForm form = new WWWForm(); //here you create a new form connection
26.         form.AddField( "myform_nick", formNick );
27.         form.AddField( "myform_pass", formPassword );
28.         w = WWW(URL, form); //here we create a var called 'w' and we sync with our URL and the form
29.         StartCoroutine(WaitForWWW());
30.  
31.         if (w.error != null) {
32.             print(w.error); //if there is an error, tell us
33.         } else {
34.             print("Test ok");
35.             formText = w.data; //here we return the data our PHP told us
36.             w.Dispose(); //clear our form in game
37.         }
38.        
39.         this.formNick = ""; //just clean our variables
40.         this.formPassword = "";
41.     }
42. }
43.  

 

Still really needing some assistance with this

 

line 28 ; w = new WWW(URL, form);

 

I am getting the following error

Code (CSharp):

1. 500 Internal Server Error
2. UnityEngine.MonoBehaviour:print(Object)
3. LoginHandler:Login() (at Assets/Resources/LoginHandler.cs:34)
4. System.Reflection.MethodBase:Invoke(Object, Object[])
5. dfEventBinding:callProxyEventHandler(Object[]) (at Assets/Daikon Forge/DataBinding/Scripts/dfEventBinding.cs:581)
6. dfEventBinding:MouseEventProxy(dfControl, dfMouseEventArgs) (at Assets/Daikon Forge/DataBinding/Scripts/dfEventBinding.cs:236)
7. dfControl:OnClick(dfMouseEventArgs) (at Assets/Daikon Forge/DFGUI/Scripts/Controls/dfControl.cs:1678)
8. dfButton:OnClick(dfMouseEventArgs) (at Assets/Daikon Forge/DFGUI/Scripts/Controls/dfButton.cs:686)
9. MouseInputManager:ProcessInput(dfInputManager, IInputAdapter, Ray, dfControl, Boolean) (at Assets/Daikon Forge/DFGUI/Scripts/Internal/Input/dfInputManager.cs:1654)
10. dfInputManager:processMouseInput() (at Assets/Daikon Forge/DFGUI/Scripts/In

 

500 internal Server Error indicates an error with the web server. Are you sure the url you are using is correct?

 

solved thanks
solve th