Windows Phone 8 C# convert base64 to image binding this resul

I'm trying to convert base64 string to image and bind the result.

This is my xaml :

<Image Source="{Binding image64}">

To be sure my base64 string is correct i did that :

    public BitmapImage image64
    {
        get
        {
            **//Convert my path img to Base64.**
            byte[] bytes = System.Text.UTF8Encoding.UTF8.GetBytes(image);
            string base64String = System.Convert.ToBase64String(bytes);
            MessageBox.Show("Base 64 String :[" + base64String + "]");



            //Convert my img base64 to img.
            byte[] fileBytes = Convert.FromBase64String(base64String);

            using (MemoryStream ms = new MemoryStream(fileBytes, 0, fileBytes.Length))
            {
                ms.Write(fileBytes, 0, fileBytes.Length);
                BitmapImage bitmapImage = new BitmapImage();
                **bitmapImage.SetSource(ms);**
                return bitmapImage;
            }
        }
    }

This code don't work in my case because of setSource. I found this "solution" here : similar question 1 similar question 2

But they don't work in my case, i think it's because they didn't use the binding. And i don't have any idea to fix it...

Sorry for my english, and i hope someone can help me :)