I try to connect and it always says this:

* Connecting to irc.us.gamesurge.net (6667)
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-irc.us.gamesurge.net- *** Looking up your hostname
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-irc.us.gamesurge.net- *** Checking Ident
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-irc.us.gamesurge.net- *** Found your hostname
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Ping? Pong!
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Your username is invalid.
Connect with your real username, in lowercase.
If your mail address were foo@bar.com, your username would be foo.
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Closing Link: Patryk by Slim.NY.US.GameSurge.net (USER: Bad username)
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* Disconnected

i tryed a whole bunch o names, i use to be able to conect with mIRC until i uninstalled it from my old computer and downloaded it on my laptop. I'm trying to log in my clans channel witch is on the gamesurge server. why does it keep doing this?