How to play sound while animation load using assetbundle

I'm loading animation from server using assetbundle and i want to play sound for this animation. In the 3ds Max everything working fine and the audio also playing with animation. Then developer given a fbx file and mp3 sound file. I imported into unity and done for the Assetbundle and uploaded the assetbundle to server. Then load into scene the animation is working but the audio is not working. What i missed here?

 // example URL of file on Android device SD-card
         string bundleURL = AssetModelString;
         
         using (WWW www = WWW .LoadFromCacheOrDownload(bundleURL, Version)) {
             
             yield return www;
             Debug.Log (Version);
             
             if (www .error != null)
                 throw new UnityException("WWW Download had an error: " + www .error);
             
             AssetBundle bundle = www .assetBundle;
             if (AssetName == "") {
                 Debug.Log ("null");
 
                 
                mBundleInstance = Instantiate (bundle.mainAsset) as GameObject;
 
                                 mBundleInstance.transform.localPosition = new Vector3(-0.2f, 0.0f, 0.0f);
                 mBundleInstance.transform.gameObject.SetActive(true);
                 
             }