i'd entered login and password in proxy settings..
logged on network..
at next start mirc can't connect to server..
log message:
[16:07] * Connecting to irc.ru (6669)
[16:07] * Firewall: Closed connection

(i dont have any firewalls installed, default winxp firewall disabled. connectig via squid installed on our FreeBSD gate..)

only when i change login and password to another valid - it starts to see irc server..
if i restart client, mirc doesn't want to connect again, until i change login and pass.. again.. and again..

something in mirc with proxy authentication..