Views bulk operations (Civicrm contacts) not working

I added the Civicrm tables to the settings.php according to the database integration guidlines at civicrm/admin/setting/uf?reset=1 I enabled watchdog logging for civicrm I installed civicrm entity. I installed views bulk operations I selected the Civicrm contact views bulk operations field in a view, and the Delete operation.
The delete operations appear to throw no errors..but the contacts are not deleted.
What could cause this?

Also, but probably not related to the issue mentioned above, when selecting the operation 'modify entity values' there is an error
Notice: Undefined index: description in views_bulk_operations_modify_action_form() (line 158 of xx/sites/all/modules/views_bulk_operations/actions/modify.action.inc).