Probleme de connection sur mirc

Bonjour,
je ne réussi pas a me connecter sur mirc sa me donne se message

* Connect retry #25 161.53.178.240 (6665)
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-161.53.178.240- *** Looking up your hostname
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-161.53.178.240- *** Checking Ident
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-161.53.178.240- *** Couldn't look up your hostname
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-161.53.178.240- *** No ident response
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-161.53.178.240- *** Ident broken or disabled, to continue to connect you must type /QUOTE PASS 15607

sa fonctionnais tres bien avant

merci

Configuration: Windows Vista
Internet Explorer 7.0