Storing image (from stream to string) into databse in windows phone7

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Mobile

Windows-Phone-7

Hi,
I am trying to store image into the database on my phone and I found out that its best I convert into byte and store it. currently I am using this code:

BitmapImage bimg = new BitmapImage();
                bimg.SetSource(this.ImageToStream(image));
                byte[] bytearray = null;
                using (MemoryStream ms = new MemoryStream())
                {
                    WriteableBitmap wbitmp = new WriteableBitmap(bimg);
                    wbitmp.SaveJpeg(ms, wbitmp.PixelWidth, wbitmp.PixelHeight, 0, 100);
                    ms.Seek(0, SeekOrigin.Begin);
                    bytearray = ms.GetBuffer();
                }
                string str = Convert.ToBase64String(bytearray);
                sounds.SoundPic = str;

and this method:

private Stream ImageToStream(Image image1)
        {
            WriteableBitmap wb = new WriteableBitmap(400, 400);
            wb.Render(image1, new TranslateTransform { X = 400, Y = 400 });
            wb.Invalidate();
            Stream myStream = new MemoryStream();
            wb.SaveJpeg(myStream, 400, 400, 0, 70);
            return myStream;

        }

And when I save it into my database, I got this error: String truncation: max=100, len=4172.

I tried increasing my database column size but I got hit by another error stating that it cannot take in 5000 (thats what I put).

Any pointers anyone??
Thanks! =)