Thank's TheWyrm now I Know the difference.
Infact I does a try, changing a little bit of my construct2 event, and I compiled my game in sandbox mode enabled, sending to Ludei cloud compiler and test my game with xcode 6 beta 5 on my real device.....
all IAP works perfectly also restore purchase button work great....
but the most frustrating for me is there isn't control when I disable the sandbox mode and send to the Apple for approval....
they reject puntually the game with the generic answer "the IAP don't work".....but what??? how can I try to correct an issue if I can't try to reproduce the error and I can't try to simulate a real transaction with my game???
They say (Apple team) that if IAP works in sandbox environment then it works also in real purchase...... but in reality it is not so!!!!
and then what should we do?