I denied bento access to my contacts. After that my Addressbook was empty and i can not add any data
Maybe this article will help you:
HELP! Deleted all my Contacts with Bento | Apple Support Communities
However Bento is well beyond it's end of life (9/30/2013) and support (7/30/2014), so you will find that current support and updated documentation is few and far between. You should stop using it as soon as possible to avoid further conflicts.
Retrieving data ...