Trouble Connecting to IRC Servers

i am trying to connect to an IRC server but it keeps giving me the same error on mIRC

* Connecting to mozilla.se.eu.dal.net (6667)
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* Unable to connect to server (Connection timed out)

* Connecting to irc.viperpr.net (6667)
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* Unable to connect to server (Connection timed out)

it's the same thing with every single server i try to connect to.

Does somebody knows a solution????

P.D. Im running WIN XP Pro and a connected thru a Cable Modem

If you have a firewall, you need to open the relevant ports. If you are running xp and you don't think you have a firewall, then check that xp's firewall is not operating. In the last couple of years some antivirus software has a firewall incorporated as well.

If you connect to a cable modem, do you have a router? You may need to allow the port in the router.