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Problems with Registering the HttpHandlers in a Web Site that Uses Authentication

In a form authentication scenario a non-logged user is redirected to the login page.When a non-logged user loads any RadEditor dialog, the ASP.NET Framework tries to load the login screen in the dialog. As a result an error which alerts that the HttpHandler of the dialog is not registered is thrown.

To ensure that the HttpHandler of the RadEditor dialog is always accessible, you should add the following two location entries to the web.config:

<configuration>
    <location path="Telerik.Web.UI.DialogHandler.aspx">
        <system.web>
            <authorization>
                <allow roles="*"/>
            </authorization>
        </system.web>
    </location>
    <location path="Telerik.Web.UI.SpellCheckHandler.axd">
        <system.web>
            <authorization>
                <allow roles="*"/>
            </authorization>
        </system.web>
    </location>
</configuration>