Error: Cannot create FMOD

While loading sounds from a certain folder, I always get the error message:

Error: Cannot create FMOD::Sound instance for resource "qB, (Operation could not be performed because specified sound/DSP connection is not ready. )
UnityEngine.WWW:GetAudioClip(Boolean, Boolean, AudioType)
<LoadFiles>c__Iterator0:MoveNext() (at Assets/Scripts/LoadFolder.cs:38)
UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)

My code:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.IO;
using System.Linq;

public class LoadFolder : MonoBehaviour
{

    public string PathString;

    public SproutSoundList ListScript;

    public AudioClip SproutSound;

    void Start()
    {
        ListScript = GameObject.Find("ScriptCargo").GetComponent<SproutSoundList>();
    }

    public void StartLoading()
    {
        PathString = transform.parent.FindChild("Path").FindChild("PathDir").GetComponent<UnityEngine.UI.Text>().text;
        PathString.Replace("\\", "/");
        StartCoroutine("LoadFiles");
    }

    IEnumerator LoadFiles()
    {
        string Url = string.Format("file://{0}", PathString);
        WWW www = new WWW(Url);
        yield return www;

        foreach (string File in Directory.GetFiles(PathString))
        {
            if (Path.GetFileName(File).Contains(".wav") || Path.GetFileName(File).Contains(".WAV"))
            {
                SproutSound = www.GetAudioClip(false, false, AudioType.WAV);
                SproutSound.name = Path.GetFileName(File);
                ListScript.SoundList.Add(SproutSound);
            }
        }    
    }

}

How to fix that??

using UnityEngine;
using System.Collections;

public class TestAudio : MonoBehaviour
{
private AudioSource _audiopoint; // аудио источник
private WWW _www;

void Start()
{
    _audiopoint = GetComponent<AudioSource>();
}

private void Update()
{
    if (Input.GetKeyDown(KeyCode.Space))
    {
        //StartCoroutine(DownloadAndPlay("http://www.tannerhelland.com/dmusic/AMemoryAway.ogg"));

         StartCoroutine(DownloadAndPlay("file:///"+ Application.dataPath + "/UserSounds/" + "/my.ogg"));
    }
} 

IEnumerator DownloadAndPlay(string url)
{
    Debug.Log(url);
    _www = new WWW(url);
    Debug.Log("Start Dowload");
    yield return _www;
    Debug.Log("Playing");
    _audiopoint = GetComponent<AudioSource>();
    _audiopoint.clip = _www.GetAudioClip(false, true, AudioType.OGGVORBIS);
    _audiopoint.clip.name = "Downloaded clip";
    _audiopoint.Play();
}

}

Be carefull of special Characters in your sound filePath !
for my part : { and } caused this problem