Popup Message is not firing when submit button clicked

protected void ButtonSubmit_Click(object sender, EventArgs e)
    {

        SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["HotConnectionString"].ConnectionString);
        con.Open();
        SqlCommand cmd = new SqlCommand("Insert into Table22 (INST_ID, TOTAL_REVE, DATE, FINYR, INSTRUCTIO, RESEARCH, PUBLIC_SER, ACADEMIC_S, STUDENT_SE, INSTITUTIO, PHYSICAL_P, SCHOLARSHI, AUXILIARY_, HOSPITALS, INDEPENDEN, OTHEREXP, TOTASSETS, TOTLIABILITY, NoNEXPPERMRESASSETS, EXPENDABLE, UNRNETASSETS, TOTALREV, TUITFEES, CURRDEBT, LONGTERMDEBT, TOTALNETASSETS) values (@INST_ID, @TOTAL_REVE, @DATE, @FINYR, @INSTRUCTIO, @RESEARCH, @PUBLIC_SER, @ACADEMIC_S, @STUDENT_SE, @INSTITUTIO, @PHYSICAL_P, @SCHOLARSHI, @AUXILIARY_, @HOSPITALS, @INDEPENDEN, @OTHEREXP, @TOTASSETS, @TOTLIABILITY, @NoNEXPPERMRESASSETS, @EXPENDABLE, @UNRNETASSETS, @TOTALREV, @TUITFEES, @CURRDEBT, @LONGTERMDEBT, @TOTALNETASSETS)Insert into Table23 (INST_ID, TOTAL_REVE, DATE, FINYR, INSTRUCTIO, RESEARCH, PUBLIC_SER, ACADEMIC_S, STUDENT_SE, INSTITUTIO, PHYSICAL_P, SCHOLARSHI, AUXILIARY_, HOSPITALS, INDEPENDEN, OTHEREXP, TOTASSETS, TOTLIABILITY, NoNEXPPERMRESASSETS, EXPENDABLE, UNRNETASSETS, TOTALREV, TUITFEES, CURRDEBT, LONGTERMDEBT, TOTALNETASSETS) values (@INST_ID, @TOTAL_REVE, @DATE, @FINYR, @INSTRUCTIO, @RESEARCH, @PUBLIC_SER, @ACADEMIC_S, @STUDENT_SE, @INSTITUTIO, @PHYSICAL_P, @SCHOLARSHI, @AUXILIARY_, @HOSPITALS, @INDEPENDEN, @OTHEREXP, @TOTASSETS, @TOTLIABILITY, @NoNEXPPERMRESASSETS, @EXPENDABLE, @UNRNETASSETS, @TOTALREV, @TUITFEES, @CURRDEBT, @LONGTERMDEBT, @TOTALNETASSETS)", con);
        cmd.CommandType = CommandType.Text;

        cmd.Parameters.AddWithValue("@INST_ID", TextBoxINST_ID.Text);
        cmd.Parameters.AddWithValue("@TOTAL_REVE", TextBoxTROA.Text);
        cmd.Parameters.AddWithValue("@INSTRUCTIO", TextBoxInstr.Text);
        cmd.Parameters.AddWithValue("@RESEARCH", TextBoxRes.Text);
        cmd.Parameters.AddWithValue("@PUBLIC_SER", TextBoxPubS.Text);
        cmd.Parameters.AddWithValue("@ACADEMIC_S", TextBoxAcad.Text);
        cmd.Parameters.AddWithValue("@STUDENT_SE", TextBoxStudS.Text);
        cmd.Parameters.AddWithValue("@INSTITUTIO", TextBoxInstiS.Text);
        cmd.Parameters.AddWithValue("@PHYSICAL_P", TextBoxOperM.Text);
        cmd.Parameters.AddWithValue("@SCHOLARSHI", TextBoxSFEDA.Text);
        cmd.Parameters.AddWithValue("@AUXILIARY_", TextBoxAuxE.Text);
        cmd.Parameters.AddWithValue("@HOSPITALS", TextBoxHosS.Text);
        cmd.Parameters.AddWithValue("@INDEPENDEN", TextBoxIndeO.Text);
        cmd.Parameters.AddWithValue("@OTHEREXP", TextBoxOED.Text);
        cmd.Parameters.AddWithValue("@TOTASSETS", TextBoxTA.Text);
        cmd.Parameters.AddWithValue("@TOTLIABILITY", TextBoxTL.Text);
        cmd.Parameters.AddWithValue("@NoNEXPPERMRESASSETS", TextBoxNPRNA.Text);
        cmd.Parameters.AddWithValue("@EXPENDABLE", TextBoxETRNA.Text);
        cmd.Parameters.AddWithValue("@UNRNETASSETS", TextBoxTUNA.Text);
        cmd.Parameters.AddWithValue("@TOTALREV", TextBoxTR.Text);
        cmd.Parameters.AddWithValue("@TUITFEES", TextBoxTFN.Text);
        cmd.Parameters.AddWithValue("@CURRDEBT", TextBoxCD.Text);
        cmd.Parameters.AddWithValue("@LONGTERMDEBT", TextBoxLTD.Text);
        cmd.Parameters.AddWithValue("@FINYR", lblYEAR.Text);
        cmd.Parameters.AddWithValue("@DATE", TextBoxDATE.Text);
        cmd.Parameters.AddWithValue("@TOTALNETASSETS", TextBoxTNA.Text);


        cmd.ExecuteNonQuery();
        ScriptManager.RegisterStartupScript(this, this.GetType(), "script", "alert('You Have Successfully Submitted the Financial Profile');", true);

        if (Page.IsValid)
            
        {
            SqlCommand level = new SqlCommand("select accessLevel, INST_ID from Table99 where INST_ID = @INST_ID AND accessLevel = @accessLevel", con);
            level.Parameters.Add(new SqlParameter("INST_ID", TextBoxINST_ID.Text));
            level.Parameters.Add(new SqlParameter("accessLevel", TextBoxaccessLevel.Text));

            SqlDataReader reader = level.ExecuteReader();
            DataTable dt1 = new DataTable();
            dt1.Load(reader);

            foreach (DataRow dr1 in dt1.Rows)
            {
                int returnedLevel = Convert.ToInt32(dr1[0].ToString());
                int accessLevel = Convert.ToInt32(dr1[1].ToString());
                Session["accessLevel"] = accessLevel;

                if (returnedLevel == 1)
                {
                    Response.Redirect("FormAPublic.aspx");
                }
                else if (returnedLevel == 11)
                {
                    Response.Redirect("FormAPublicL.aspx");
                }
                else if (returnedLevel == 7)
                {
                    Response.Redirect("CEOPage.aspx");
                }
                
                con.Close();