BuddyPress.org

any one here to help me
installed and activated plugin and in widget area it is asking to put Birthday field Name (or ID)

from where i can get this ?

and as said in plugin page Birthday field must have been previously created in the Buddypress profile page so i opened USERS >Profile Fields >Add New Field

here i user date selector to create it and after that in registration page user have to put their date of birth .but from where i can get Birthday field Name (or ID) please help .Thankyou