Could not find stored procedure

I have been working on this piece of code for a long time now and still get error after several modifications.

This is my DataBase Class

public DataTable ExecuteSP(string UserName, string Password)
        {
            con = new SqlConnection(@"Data Source=My-PC;Initial Catalog=MyDB;Integrated Security=True");
            con.Open();
            cmd = new SqlCommand("LoginUser", con);
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.Add("@UserName", SqlDbType.NVarChar, 20).Value = UserName;
            cmd.Parameters.Add("@Password", SqlDbType.NVarChar, 20).Value = Password;
            da = new SqlDataAdapter(cmd);
            da.Fill(dt);
            con.Close();
            return dt;
        }

this is my C# code:

dt = new DataTable();
            dt = dbClass.ExecuteSP(UserName, Password);

            if (dt.Rows.Count > 0)
            {
                boolReturnValue = true;
                Session["UserId"] = dt.Rows[0]["Id"].ToString();
                string updateLastLogin = "Update [User] SET LastLogin='" + System.DateTime.Now.ToString() + "' where Id='" + Session["UserId"].ToString() + "'";
                dbClass.ConnectDataBaseToInsert(updateLastLogin);
            }

This is my stored procedure:

CREATE PROCEDURE [dbo].[LoginUser]  (
    @UserName nvarchar(20),
    @Password nvarchar(20)
	)
AS

    SET NOCOUNT ON;
	 (
    SELECT *  FROM [User]  WHERE Email = @UserName AND Password = @Password
      )

When I run this work I get error message the says: Could not find stored procedure

Please can someone review this critically and tell me what is wrong with the code.