It's (or was) almost certainly an internal error in the Mudcat system. Clearly it's gone away now, but they often have little hiccups like that. I often see "disabled by system administrator" or similar and it comes back a few seconds later. Maybe Max, Joe or a clone is making a configuration change that can't be done while we're in the middle of using it.

If your ISP was blocking it you'd most likely just get a "can't connect" display from your web browser.

Anahata