Playerprefs not storing data?

I have a script that should check for a stored username and password, then either send it to be checked, or wait for user input to send off, then change scenes. But for whatever reason, it's not working, can anyone tell why?

     var email = "E-Mail";
     var password = "Password";
     var cam : GameObject; //Assign this in the editor or in Start, find the door
     function sendInfo(user, pass){
     // Create a form object for sending high score data to the server
     var form = new WWWForm();
     // Assuming the perl script manages high scores for different games
     form.AddField( "email", email );
      // The name of the player submitting the scores
     form.AddField( "password", password );
     var w = WWW("I AM A URL IN THE REAL PROGRAM!", form);
     yield w;
     if(w.text == "valid"){
         PlayerPrefs.SetString("name", email);
         PlayerPrefs.SetString("pass", password);
         Application.LoadLevel("mainmenu");
     }
 }
 
 // Create a public variable where we can assign the GUISkin
 var customSkin : GUISkin;
 
 function OnGUI () {
     if(PlayerPrefs.GetString("name") != null){
         if(PlayerPrefs.GetString("pass") != null){
             sendInfo(PlayerPrefs.GetString("name"), PlayerPrefs.GetString("pass"));
         }
     }
     GUI.skin = customSkin;
     // Make a background box
     GUI.Box (Rect (10,(Screen.height*0.5)-125,(Screen.width*0.5)-20,250), "Login");
 
     // Make the text fields
     email = GUI.TextField (Rect (60, (Screen.height*0.5)-30, (Screen.width*0.5)-120, 20), email);
     password = GUI.PasswordField (Rect (60, (Screen.height*0.5)+5, (Screen.width*0.5)-120, 20), password, "•"[0], 25);
 
     // Make the second button.
     if (GUI.Button (Rect (55,(Screen.height*0.5)+40,80,25), "Login")) {
         sendInfo(email, password);
     }
 }