EventValidation Parser Error

[Dave]

Does anyone know what might cause this error in IE when my page loads:

Error parsing attribute 'enableeventvalidation': Type '_Default' does
not have a public property named 'enableeventvalidation'

This is the line of code it stops on:
<%@ Page Language="C#" AutoEventWireup="true" Inherits="_Default"
Debug="true" EnableEventValidation="false" %>
Source File: /main/default.aspx Line: 1


I am just copying my site from another server. It works fine on the
first server. Apparently I need to get _Default to have the above
mentioned property. How would I do that?

 

[Teemu Keiski]

Is the __Default class inheriting from System.Web.UI.Page?