When you try to open an existing AxCMS page, you have "The resource cannot be found. " error returned by ASP.NET.
There is no AxCMS httpHandler in web.config or httpHandler extension differs from actually used
Add following to httpHandlers section of the web.config:
<add verb="*" path="*.YourCMSExtension" type="Axinom.AECMS.HttpHandler.LiveHttpHandler, AxCMS.BL" />
AxCMS.net versions: before 9.0
IIS versions: 5.x, 6.0