I don't think you're banned from the IRC channel.
If you're using the site's Java IRC client, you may have to try to connect to a different EFnet server from the default one.
Here are two EFnet servers that I would recommend using:
irc.efnet.pl
irc.servercentral.net
You could also try this temporary page:
http://segakatana.com/dcemu
Let me know if it works.
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