Problem with Custom Error Pages

I’m trying to setup my own custom error page but it doesn’t show up. Seems like it should be a simple process. Can someone tell me what I’m doing wrong?

I made a basic HTML page called error.html. In HSphere I entered the file name, checked “file” and assigned it to error codes, like 404. I didn’t use a slash before the name.

However, if a page is not found on the website, my error page is not shown.

The domain I’m working on is expectationsguide.com. It’s a windows server.

It must take awhile to kick in because it’s working now.