Nickname from e-mail! I want to change my name what appear from my adress.?

When i send a mail, that person see that i am " pretty dolly thing" (something like that) a old nickname, now how i can change it. That person to see my name, i went to options and account information, there is all right, is my name. When i send again a message... there we go, appear again that silly nickname.Please, help me...how can i change it ! I want to use my name :) Kisses and thank you a lot.You can answer me at ruxandra.bosoi@yahoo.com.Thank you so much all !