Parsing Error in ASP Web App

 I'm creating a Web App to run inside a ASP web site. Built my code and when ever I try to view my Web Form the web site I recieve the following error:
 Parser Error Description:
An error occurred during the parsing of a resource required to service this
request. Please review the following specific parse error details and modify
your source file appropriately.

Parser Error Message: Could not
load type 'APFW_CustTables.CustTableForm'.

Source Error:





Line 1: <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="CustTableForm.aspx.cs" Inherits="APFW_CustTables.CustTableForm" %>
Line 2:
Line 3: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitio ...