Sharp,
In this case I don't think your Authenticator works...
Yahoo mail seems to use
JSP, ASP or something similar to ensure security, so the Authenticator doesnt work.
If you could have typed in "http://UserName:Password@mail.yahoo.com" in your browser and go straight into your mail box, then you can get the Authenticator to work...
Maybe if Yahoo Mail uses parameters like "http://mail.yahoo.com?User=UserName&Password=PassWord" you can figure out a way of heading straight into your mail-box...
I think you will have to ask Yahoo about that...
/Bamse