Networks

I m trying to display jpg image on C# web page retrieved from ms-access database. Image is stored in database as OLE object under img_stream" variable. My code is:
private void Page_Load(object sender, System.EventArgs e)
{
// Put user code to initialize the page here
myAccessConnection = new OleDbConnection(connStr);
openAccessConnection();
OleDbCommand myCommand = new OleDbCommand("select img_stream from tblImg where img_id=4", myAccessConnection);
//myCommand.CommandType = CommandType.Text;
//OleDbParameter img_id = new OleDbParameter("4", OleDbType.Integer);
//myCommand.Parameters.Add(img_id);
OleDbDataAdapter myAdapter = new OleDbDataAdapter(myCommand);
DataSet myDataSet = new DataSet();
myAdapter.Fill(myDataSet);
MemoryStream ms = new MemoryStream();
DataTable dataTable;
dataTable = myDataSet.Tables["tblImg"];
OleDbDataReader reader = myCommand.ExecuteReader();
if(reader.Read())
{
//System.Drawing.Image _image = System.Drawing.Image.FromStream( new System.IO.MemoryStream( (byte[])reader["img_stream"] ) );


Response.ContentType = "image/jpeg";
byte[] imageContent = (byte[])(reader["img_stream"]);
ms.Write(imageContent, 0, imageContent.Length);
Bitmap bmp;
bmp = new Bitmap(ms);
bmp.Save(Response.OutputStream, ImageFormat.Jpeg);
ms.Close();
closeAccessConnection();
}
else
{
closeAccessConnection();
}
}
String connStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + HttpContext.Current.Server.MapPath("App_Data/db1.mdb");

// Object created for Oledb Connection
OleDbConnection myAccessConnection;

protected void openAccessConnection()
{
// If condition that can be used to check the access database connection
// whether it is already open or not.
if (myAccessConnection.State == ConnectionState.Closed)
{
myAccessConnection.Open();
}
}

protected void closeAccessConnection()
{
// If condition to check the access database connection state
// If it is open then close it.
if (myAccessConnection.State == ConnectionState.Open)
{
myAccessConnection.Close();
}

}
I get the following error on executing this code: "Invalid Parameter Used" on line "bmp = new Bitmap(ms)"
Please i need help to resolve this error...as it has been so long i m trying to get rid of it...