How to configure proxy to let use in irc clients like mirc xchat and anothers??? like client------>[router(web proxy)]-------[irc.server]
See the following link:
http://www.mikrotik.com/docs/ros/2.8/ip/webproxy.content#7.53.6
Then google about ports xchat uses (something like 6667 port).
i chek out manual and all works ok 