Numark idj pro crashes continuously - was fine 2 days ago - whats changed?

My Numark IDj Pro crashed last night at a function & continued to crash. I had to the function staright from the IPAD2 using a line out. Never dj’d straight from the IPAD2 before so was a struggle & a very stressful evening.The controller was fine 2 days ago at a function. Your software works fine on a standalone IPAD2 as soon as i use it with the IDj Pro it crashes. Have rebooted IPAD2 & checked for any outstanding updates. Please Help, many thanks. (picture shows me running the function without the controller)

Some more information - the App only crashes in waveform & not in turntable view?