Why am I not receiving messages on my iPad

assuming your profile is correct and you have an ipad 2 with wifi only. power your ipad off and back on and check your settings to insure you are connected to the wifi network. turn the wifi off and then back on and choose the wifi network if it does not automatically connect.

are you connected to your usual wifi network? Are you able to send messages? Is this specific to a contact or are you not receiving any messages at all even with contacts with whom you have previously sent and received messages without any issues?