Data Not Inserting into Database

[twilitegxa]

My form upon submission is displaying my error message and not inserting my data into my database. What am I doing wrong? Here is my page:

<%@ Page Title="Dorknozzle Help Desk" Language="C#" MasterPageFile="~/Dorknozzle.master" AutoEventWireup="true" CodeFile="HelpDesk.aspx.cs" Inherits="HelpDesk" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<h1>Employee Help Desk Request</h1>
<asp:Label ID="dbErrorMessage" ForeColor="Red" runat="server" />
<p>
Station Number:<br />
<asp:TextBox ID="stationTextBox" runat="server" CssClass="textbox" />
<asp:RequiredFieldValidator ID="stationNumReq" runat="server" ControlToValidate="stationTextBox" ErrorMessage="<br />You must enter a station number!" Display="Dynamic" />
<asp:CompareValidator ID="stationNumCheck" runat="server" ControlToValidate="stationTextBox" Operator="DataTypeCheck" Type="Integer" ErrorMessage="<br />The value must be a number!" Display="Dynamic" />
<asp:RangeValidator ID="stationNumRangeCheck" runat="server" ControlToValidate="stationTextBox" MinimumValue="1" MaximumValue="50" Type="Integer" ErrorMessage="<br />Number must be between 1 and 50." Display="Dynamic" />
</p>
<p>
Problem Category:<br />
<asp:DropDownList ID="categoryList" runat="server" CssClass="dropdownmenu" />
</p>
<p>
Problem Subject:<br />
<asp:DropDownList ID="subjectList" runat="server" CssClass="dropdownmenu" />
</p>
<p>
Problem Description:<br />
<asp:TextBox ID="descriptionTextBox" runat="server" CssClass="textbox" Columns="40" Rows="4" TextMode="MultiLine" />
<asp:RequiredFieldValidator ID="descriptionReq" runat="server" ControlToValidate="descriptionTextBox" ErrorMessage="<br />You must enter a description!" Display="Dynamic" />
</p>
<p>
<asp:Button ID="submitButton" runat="server" CssClass="button" 
        Text="Submit Request" onclick="submitButton_Click" />
</p>
</asp:Content>

Code-behind:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Configuration;

public partial class HelpDesk : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            SqlConnection conn;
            SqlCommand categoryComm;
            SqlCommand subjectComm;
            SqlDataReader reader;
            string connectionString = ConfigurationManager.ConnectionStrings["Dorknozzle"].ConnectionString;
            conn = new SqlConnection(connectionString);
            categoryComm = new SqlCommand("SELECT CategoryID, Category FROM HelpDeskCategories", conn);
            subjectComm = new SqlCommand(
            "SELECT SubjectID, Subject FROM HelpDeskSubjects", conn);
            try
            {
                conn.Open();
                reader = categoryComm.ExecuteReader();
                categoryList.DataSource = reader;
                categoryList.DataValueField = "CategoryID";
                categoryList.DataValueField = "Category";
                categoryList.DataBind();
                reader.Close();
                reader = subjectComm.ExecuteReader();
                subjectList.DataSource = reader;
                subjectList.DataValueField = "SubjectID";
                subjectList.DataValueField = "Subject";
                subjectList.DataBind();
                reader.Close();
            }
            finally
            {
                conn.Close();
            }
        }
    }

    protected void submitButton_Click(object sender, EventArgs e)
    {
        if (Page.IsValid)
        {
            SqlConnection conn;
            SqlCommand comm;
            string connectionString = ConfigurationManager.ConnectionStrings["Dorknozzle"].ConnectionString;
            conn = new SqlConnection(connectionString);
            comm = new SqlCommand("INSERT INTO HelpDesk (EmployeeID, StationNumber, " + "CategoryID, SubjectID, Description, StatusID) " + "VALUES (@EmployeeID, @StationNumber, @CategoryID, " + "@SubjectID, @Description, @StatusID)", conn);
            comm.Parameters.Add("@EmployeeID", System.Data.SqlDbType.Int);
            comm.Parameters["@EmployeeID"].Value = 5;
            comm.Parameters.Add("@StationNumber", System.Data.SqlDbType.Int);
            comm.Parameters["@StationNumber"].Value = stationTextBox.Text;
            comm.Parameters.Add("@CategoryID", System.Data.SqlDbType.Int);
            comm.Parameters["@CategoryID"].Value = categoryList.SelectedItem.Value;
            comm.Parameters.Add("@SubjectID", System.Data.SqlDbType.Int);
            comm.Parameters["@SubjectID"].Value = subjectList.SelectedItem.Value;
            comm.Parameters.Add("@Description", System.Data.SqlDbType.NVarChar, 50);
            comm.Parameters["@Description"].Value = descriptionTextBox.Text;
            comm.Parameters.Add("@StatusID", System.Data.SqlDbType.Int);
            comm.Parameters["@StatusID"].Value = 1;
            try
            {
                conn.Open();
                comm.ExecuteNonQuery();
                Response.Redirect("HelpDesk.aspx");
            }
            catch
            {
                dbErrorMessage.Text = "Error submitting the help desk request! Please " +
                    "try again later, and/or change the entered data!";
            }
            finally
            {
                conn.Close();
            }
        }
    }
}