Android : Convert Byte array to bitmap not working - android

I have a web service written in vb.net, with it i retrieve an image (blob) from my mysql database. I convert it to byte() and treat it with my android app (written in eclipse) where i just need to show it, therefore for use it in an imageview.

class AsyncCallWS3 extends AsyncTask<String, Void, String> {

        ImageView img;

        public AsyncCallWS3(ImageView  img) {
                // TODO Auto-generated constructor stub
                this.img = img;
        }

        @Override
        protected String doInBackground(String... params) {

                String result;
                result = SponsorWebService.getSponsor("getDetails", "abed", "kader");
                this.Execute();
                return result;
        }
        protected void Execute(){
                String result;
                byte[] byteArray;
                result = ImageService.getImage("ralph", "kesrouani","getImage");
                
                byteArray = result.getBytes();
                final BitmapFactory.Options options = new BitmapFactory.Options();
        
                
                options.inJustDecodeBounds = true;
                options.inSampleSize = 64;
                Bitmap bm = BitmapFactory.decodeByteArray(byteArray,0,byteArray.length,options);

                img.setImageBitmap(bm);
                
        }
}

This is my asynctask where i called a java class and using soap i retrieve the string, convert to byte, convert then to bitmap. But when converting to bitmap i get a null value.

Please i've been on this for days and i can't find any help on the web. I can give you extra info about the code. Thanks