It seems that configuration you use force calling an internal handler before page internal check and you are redirected to our cmsentrypoint.aspx. Please add all modules/handlers after CmsHttpModule. All page requests pass through cmsentrypoint.aspx. The file inherits InternalPage.cs which implements methods for page management- getting the mode of the page, name of the ICms Page, instance of CmsManager, optional page settings like EnableViewState, returns the name of the Theme to be set for the current page . Our CmsHttpModule rewrites the URL to cmsentrypoint.aspx, which is the page handler for each CMS page in the Sitefinity. It seems that something in your project forces calling an internal handler before page internal check and you are redirected to our cmsentrypoint.aspx. This could also happen if you force some custom logic for logging users.
Also make sure that there is no web.config inheritance
which is quite common in asp.net nested application.
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