Hello

Go into settings on your iPad, then on the left hand side of the window find the Core Control app, select it and then on the right hand side do two things

1: Turn on prevent sleep.

2: Enter the system core IP address.

Something to also be aware of is that after the Core has been rebooted it takes a while for the iPad to get all the library info, so if you turn the Core off regularly you will experience this situation.

Russ