Programming

Hello, I’ve already found the solution for the first challenge and everything worked perfectly. But now, everytime I’m trying to connect to the IRC server (directly by root-me or by my program), I’ve got the following error:
Closing link: (55c9ca02@ircip1.mibbit.com) [Throttled]. No way to connect to the server. And it’s truly embarrassing me, because I think I succeed at solving the second challenge. So am I ban or something like that ? Sorry if my question seems a bit stupid, but I never used IRC before and google wasn’t my friend this time, so...