ไม่ทราบว่า เขียนโค้ด insert รูปภาพถูกรึป่าว ทำไม insert ข้อมูลไม่เข้า database (insert รูปภาพ โดยใช้ FileUplode)

private SqlConnection Conn;
        string strConn;
        linqDataProblemDataContext db = new linqDataProblemDataContext();

        protected void Page_Load(object sender, EventArgs e)
        {
            strConn = WebConfigurationManager.ConnectionStrings["ProjectDBConnectionString"].ConnectionString;
            Conn = new SqlConnection(strConn);
            Conn.Open();

            txtCalendar.Text = DateTime.Today.ToString("dd-MM-yyyy");

        }
        protected void btnSave_Click(object sender, EventArgs e)
        {
            Problem prob = new Problem();
            string sql = "INSERT INTO Problem (ProbTitle, DateProb, ProbDetail, ProbImg) " +
                         " VALUES (@ProbTitle, @DateProb, @ProbDetail, @ProbImg)";

            SqlCommand com = new SqlCommand(sql, Conn);
            com.Parameters.AddWithValue("@ProbTitle", txtTitle.Text.ToString());
            com.Parameters.AddWithValue("@DateProb", Convert.ToDateTime(txtCalendar.Text));
            com.Parameters.AddWithValue("@ProbDetail", txtDetailProblem.Text.ToString());

            if (FileUploadPic.HasFile && FileUploadPic.PostedFile.ContentLength > 0)
            {
                byte[] fileByte = FileUploadPic.FileBytes;
                Binary binaryObj = new Binary(fileByte);
                com.Parameters.AddWithValue("@ProbImg", binaryObj);
            }
            Conn.ConnectionString = strConn;
            Conn.Open();
            com.Connection = Conn;
            com.CommandText = sql;
            com.CommandType = CommandType.Text;

            try
            {
                com.ExecuteNonQuery();
                this.lblResult.Text = "Record Inserted";
                this.lblResult.Visible = true;
                com = null;
            }
            catch (Exception ex)
            {
                this.lblResult.Visible = true;
                this.lblResult.Text = "Record can not insert Error ("+ ex.Message +")";
            }
            Conn.Close();
            Conn = null;
        }