not able to login in yahoomail account


New Email
i have purchased a new samsung laptop .but i am not able to login into my yahoo mail account.

i have tried with different user ids & password but in all cases error is showing that wrong user id or password.

but i am able to login into my account at different laptop/desktops using same credentials but not able to login on my laptop only .

i can login into my Gmail account on my laptop.

plz help to resolve the problem