Your ISP is one of those very rare, um, companies, (I only know of one other) which not only offer their services to residents and businesses alike, but also rent out proxies to criminals thus causing them to be flagged by, well, pretty much every black list there is.
I've lifted the ban against your IP, but knowing your ISP they will change it, and no doubt our firewall will drop on the new one. So if/when that happens I'll poke another hole in the firewall and lift that ban, and I apologise for the annoyance this causes.
It's because, as predicted, your ISP changed your IP. If you ever want to know your WAN IP you can see it here http://getip.com and note if the KR server firewall catches you again you can be sure going to that site will reveal yet another new IP for you.
Having said that though the IP you have is not banned, just to confirm in the JKA console put: -
/connect kr1.knights-reborn.org
And see how that goes.