How should change the first name on yahoo profile account?

I have already account with yohoo , changing my name on my profile , it shown name has been chang but after sending mail to some one my first name will appear, how to able to change permanetly ?

How should change the first name on yahoo profile account?
To change how your name appears in other peoples’ incoming mail.





For “all new yahoo mail”


1. Click Options in the upper-right corner of your Yahoo! Mail page.


2. Under “Management”, click General Preferences.


3. Right at the top, in the “From name:” type in the name you want to show.


4. Click Save to put your new settings into effect.





For “yahoo mail classic”


1. Click Options in the upper-right corner of your Yahoo! Mail page.


2. Click mail options.


3. Click general preferences%26gt;type in the name you want to show in your mail.


4. Click Save to put your new settings into effect.