Go to "edit blog settings" and in the setting:

When displaying your identity use:

Select Full Name.

Hope this helps.

Hello Antonio,

thanks for your reply. Eventhough if i made the changes as you have specified to choose the Full Name option to display the identity ( i have already done those changes),  at the time of adding a comment it displays the UserName at the Your Name: field. I want the Users FirstName & Last Name to be displays at the Your Name field.

The problem occurs only when you adding a comments at the Blog.

Kindly give some solutions.

Regards,

Praveen.