AssetBundles problems

Hi everyone.
I'm trying to figure out what I'm doing wrong.
My apk is over 150mb so I decided to use AssetBundles to download (url) scenes from the server. On the PC it works fine and load the scene but when I try to build on Android nothing happens and the progress bar is always stay at zero it does not give me any error on the log.
Script that i use to download and load:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using UnityEngine.UI;
4. using System;
5. using System.IO;
6. using UnityEngine.SceneManagement;
7.  
8. public class BundleWebLoader : MonoBehaviour
9. {
10.     public string url;
11.     public int downloaded = 0;
12.     AssetBundle bundle;
13.     public System.Object test;
14.     public Slider progressbar;
15.     public Text percent;
16.     public float progress;
17.  
18.     WWW www;
19.  
20.  
21.     void Update()
22.     {
23.         progress = www.progress;
24.         progressbar.value = progress;
25.         percent.text = progress.ToString() + "%";
26.     }
27.  
28.     private void Start()
29.     {
30.         ClearCache();
31.         StartCoroutine(LoadFromServer());
32.     }
33.  
34.  
35.     IEnumerator LoadFromServer()
36.     {
37.         yield return new WaitForEndOfFrame();
38.             if (downloaded == 0)
39.             {
40.                 using (www = WWW.LoadFromCacheOrDownload(url, 1))
41.                 {
42.                     yield return www;
43.                     if (www.error != null)
44.                         throw new Exception("WWW download had an error:" + www.error);
45.                     if (www.error == null)
46.                     {
47.                         bundle = www.assetBundle;
48.                     }
49.                 }
50.                 if (Caching.ready == true)
51.                 {
52.                     downloaded = 1;
53.                     string[] scenePath = bundle.GetAllScenePaths();
54.                     Debug.Log(scenePath[0]);
55.                     SceneManager.LoadScene(scenePath[0]);
56.                 }
57.            
58.  
59.  
60.         }
61.  
62.     }
63.  
64.     void ClearCache()
65.     {
66.         Directory.CreateDirectory("Cache1");
67.         Directory.CreateDirectory("Cache2");
68.         Directory.CreateDirectory("Cache3");
69.  
70.         Caching.AddCache("Cache1");
71.         Caching.AddCache("Cache2");
72.         Caching.AddCache("Cache3");
73.  
74.         bool success = Caching.ClearCache();
75.  
76.         if (!success)
77.         {
78.             Debug.Log("Unable to clear cache");
79.         }
80.     }
81. }