Error when publishing web app with user control .ascx

 
I am adding new Web Site Administration Tool functionality to my website using this code by Dan Clem: http://www.4guysfromrolla.com/articles/052307-1.aspx and he created a user control .ascx file, (Alpha hyperlinks). When I build it using VS 2008, I do not get any errors, but when I try to publish it using the VS publishing tool, to the server, I get an error.
'System.Web.UI.UserControl' does not contain a definition for 'Letter' and no extension method 'Letter' accepting a first argument of type 'System.Web.UI.UsersControl' could be found (are you missing a using directive or an assemblt reference?)
Code of using control:
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System ...