Guys, need help on setting up Yahoo.com web mail on N900

Have tried and tried but going through automated set up, as soon as you hit save, it has a three second think about the settings, then yellow bar shows saying username or password is incorrect

having tried all variations of what username could be, and making sure password was in right case etc etc still nothing

Anyone managed to succesfully do this as yet? i searched forum and no one else lists a similar issue

Thanks