profile2 problem with views

I have created a profile 2 type profile, when I create a views of profile2 fields, I get this error:

Warning: array_flip()‎ [function.array-flip]: Can only flip STRING and INTEGER values!‎ in EntityAPIController->load()‎ line 219 in /sites/all/modules/entity/includes/entity.controller.inc
Warning: array_flip()‎ [function.array-flip]: Can only flip STRING and INTEGER values!‎ in DrupalDefaultEntityController->cacheGet()‎ (line 355 in ‎/includes/entity.inc).

can anyone help me??