Error when try to update:schema

[Abstracter]

[Doctrine\Common\Persistence\Mapping\MappingException]
Class 'Cunningsoft\ChatBundle\Entity\AuthorInterface' does not exist.

This error occur when i insert (new Cunningsoft\ChatBundle\CunningsoftChatBundle(),) in AppKernel.php and after implements (AuthorInterface)in my entity can't update:schema with this error.