I installed a fresh copy of DNN 7.2 (whatever Community is called). The 404 Error page was created successfully during the installation. I even double-checked the PortalSettings table to make sure it was marked as AUM_ErrorPage404. Unfortunately, it does not work/never shows. No matter what bogus URL I type in, it will never display.

Some examples:

/nonexistant gives me the generic DNN Error page with the Return to Site button.

/nonexistant.aspx gives me a .NET The resource cannot be found. 404 error.

/nonexistant.htm gives me a Server Error of 404 - File or directory not found.

Please tell me what I am doing wrong. :(