What browser are you using? It works fine for me with Firefox and Chrome. It won't work with old-school Internet Explorer. Make sure you aren't using some sort of ad blocker or something that could be blocking it.
Also, JUST type your local IP address in the browser address line. Don't type http or anything else.
It is enabled in the configuration but quite possible is the outdated Firefox browser. A box pops up for signing in the browser with the IP address and password that work for the other telnet programs.
I just wanted to create some customized bouquets and sat XML for editing favorites and such for quick setup in other slots for other images. I'll try again when time permits. Never hurts to have backups.