IRC disconnected

[Alejandro]

Hola!!

I have a problem when using IRC clients: I *always* get a *huge* lag
(most of the times I just get disconnected). I really don't know why.
Surfing and downloading is alright! (~400 KBps) but IRC's clients (I've
tried bitchx and Xchat) refuse to work properly. 

I forwarded the port 6667 to my ip address but that didn't work.

Any ideas will be welcomed ;)
Saludos

Alejandro