Because my office using Squid as Proxy server, some modification of squid.conf is adding.
This line below (red bold) you must add on squid.conf.
acl SSL_ports port 443
acl SSL_ports port 5050
acl Safe_ports port 80
acl Safe_ports port 21
acl Safe_ports port 443
acl Safe_ports port 70
acl Safe_ports port 210
acl Safe_ports port 1025-65535
acl Safe_ports port 280
acl Safe_ports port 488
acl Safe_ports port 591
acl Safe_ports port 777
acl CONNECT method CONNECT
acl shoutcast rep_header X-HTTP09-First-Line ^ICY\s[0-9]
acl apache rep_header Server ^Apache
Restart Squid : #service squid restart
Try connect from pidgin.
If any problem don't be ashame to put comment in this post. Thank's .
