Could not load type 'site._Default'

I have develop a simple website using VS8 and C# when I debug everything works fine, then I built using Ctrl + Shift + B and when I upload the site to a godaddy server it display the next 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 'testDemo._Default'. Source Error: Line 1: <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="testDemo._Default"%> Line 2: Line 3: A solution I found is removing the part `Inherits="testDemo._Default"`, but when debuging it does not execute the "`Page_Load(object sender, EventArgs e)`". Does anyone knows what is causing this error?