It will depend on some factors, I've not got Apple hardware with me to test, but:
iPad version?
iOS version on the iPad?
Exact version of Kodi installed on your DroidBOX? (There is some support for AirPlay built into Kodi, before you even start to use DroidBOX Share)
Settings related to this checked in Kodi? (click the System menu, Services, AirPlay)