Yahoo! Chat Servers Changed June 5th, 2008

Chat Servers cs1.msg.dcn.yahoo.com to cs60.msg.dcn.yahoo.com located in Sunnyvale
These servers are what a lot of chat clients use, these would not allow you to connect

Yahoo have switched to there Dallas servers - (24 servers)
cs101.msg.mud.yahoo.com to cs124.msg.mud.yahoo.com

On Chat Clients you need to use these new servers to connect or use scs.msg.yahoo.com
what will get you on these new MUD servers.