Stored Procedure from C# ASP.net page

Hi,
I'm trying to execute a stored procedure from c# code and ASP page. Here is my code.
public partial class _Default : System.Web.UI.Page
{
    string strcon = "Data Source=BLVU316DB2\\PORTAL;Initial Catalog=u2kdb;Integrated Security=True";
    SqlConnection con = new SqlConnection();
    SqlCommand com = new SqlCommand();

    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string fn = txtFN.Text;
        string mi = txtMI.Text;
        string ln = txtLN.Text;  
        string title = txtTitle.Text;
try
        {
            con.ConnectionString = strcon;
            con.Open();

            SqlCommand cmd = new SqlCommand("dbo.usp_createUserId", con);
            cmd.CommandType = CommandType.StoredProcedure;

            cmd.Parameters.Add(new SqlParameter("@UserId", userid));
            cmd.Parameters.Add(new SqlParameter("@LastN", ln));
            cmd.Parameters.Add(new SqlParameter("@FirstN", fn));
            cmd.Parameters.Add(new SqlParameter("@MiddleI", mi));
            cmd.Parameters.Add(new SqlParameter("@Title", title));

            com.ExecuteNonQuery();
            con.Close();
            Label1.Text = "success";
        }
        catch
        {
            Label1.Text = "error";
        }

}
}
It does not add a new entry to the DB but it also does not error out either. The Label do not get written to.