How to stop sending info to apple automatically

Whenever I sync my iPad in iTunes, there will be a prompt asking me to send data back to Apple. The check box "don't ask me again" or sth similar is checked by default. I don't have an issue of sending the crash data to Apple, but I want to be able to take control in that. Normally I will uncheck that box and then send, but just now in a hurry i clicked send without unchecking the box. I tried to look for an option to disable the auto sending in the preferences but can't find it. can someone please tell me how i can disable it again?

Thanks!