Pidgin – cannot connect to Yahoo messenger [Solution]

I just noticed the abnormality with Pidgin 2.5.5 (running on Ubuntu) these few days, I couldn’t connect my Yahoo messenger account at all. According to the discussion of Bug #389278 it appears that Yahoo was trying to change its protocol.
A quick way to have Pidgin connecting to Yahoo messenger server again is to change the Pager server setting for the Yahoo account in Pidgin.

To do this, from Pidgin:

Manage Accounts (Ctrl + A)
Select the Yahoo account from the list, and click Modify
Click on Advanced tab, under the Yahoo Options, in the Pager server field replace scs.msg.yahoo.com with cn.scs.msg.yahoo.com

save and restart Pidgin, Then  try to connect yahoo messenger. It works for me.
GoodLuck.