Yahoo Mail Trouble

[mikelaf1]

I got a new Motorola RazrM. When programming it, I am trying to add a yahoo mail account but it keeps telling me "the username or password you have entered is incorrect". I know the user name is right and I have even gone through Yahoo to change my password (twice). I can log in to it on my laptop but not on my Razr. Is there a security setting or something I'm missing or how do I fix this?