yod.el is a client for the Yahoo! Messenger chat protocol (YMSG 12). It is written in emacs lisp (with a little help from C), and supports chatrooms, instant messages, and conferences.
I am having trouble using YodEl
The Messages buffer shows this after the unsuccessful attempt to logon:
trying scs.msg.yahoo.com
connected
Password:
Password: .
Password: ..
Password: ……
error in process filter: yodel-list-pending-handler: unsuccessful logon (2)
error in process filter: unsuccessful logon (2)
disconnected
Can anybody help me with this one? Thanks! 
Since I started working on yod.el, Yahoo! has changed their encryption scheme at least twice. To handle those changes easily, yod.el uses a small C program (called “ycrypt”) to do password encyrption. The C source comes from whatever other open source Yahoo client cracks the password change first.
Most of the problems people have reported with yod.el are due to a misconfigured setting for ycrypt. It looks to me like that ClairChing ‘s problem too.
One of the yod.el customization options is ‘yodel-crypt-program – the value of that option should be set to the path of your ycrypt program.
Things seem to be ok now
Thanks for the help - ClairChing