iOS mail not accepting Yahoo password

Yahoo has required me to change my email password, which I did.
however when I update my iOS Mail, which was connected to Yahoo, to use the new password.

it would not accept it.. there were several reasons
some were.. can't connect to yahoo
others were username or password is incorrect.

I have no problem logging on from my PC.

I've also tried deleting my yahoo mail account from iOS and re-adding it.. no luck..

:(