WWW didnt work on device ON UNITY 3.3?

i make this code using C Sharp to send the data to the server. it works on the unity simulator but didnt work on android device. im using nexus S and nexus one. Is there any problem with my code? it works on unity 3.0 but in unity 3.3(trail version) it didnt work anymore. using UnityEngine; using System.Collections;

public class SendDetails : MonoBehaviour {

 public string url = "test url";
 public string key = "test key";
 public string urlCheck = "test url";
 
 [HideInInspector]
 public bool sent = false; 
 public bool loading = false;
 public void SumUpData(string name, string ic, string contact, int score, int level, float height)
 {
     loading=true;
     WWWForm form = new WWWForm();
     form.AddField("key", key);
     form.AddField("ic", ic);
     form.AddField("username", name);
     form.AddField("contact", contact);
     form.AddField("score", score.ToString());
     form.AddField("level", level.ToString());
     form.AddField("height", height.ToString());
     WWW www = new WWW(url, form);

     StartCoroutine(WaitForRequest(www));
 }
 public void checkInternet()
 {
     WWW www = new WWW(url);

     StartCoroutine(WaitForRequest(www));
 }
 
 IEnumerator WaitForRequest(WWW www)
 {
    yield return www;

     if (www.error == null)
     {
         
         Debug.Log("WWW Ok!: " + www.text);
         loading=false;
         sent = true;
     } 
     else 
     {
         
         Debug.Log("WWW Error: "+ www.error);
         loading=false;
         sent = false;
     
     }    
     
      
 }
 
 

     

}