I am new to your app so apologise if I have missed something or am being stupid?

The app crashes every I try to record video, every time I pass a start trigger my iPhone returns to the home screen? this also happens if I try to use the manual record , when record now is pressed the phone returns to the home screen?
My set up
iPhone 4S
Tom Tom mount
XGPS160
I have removed all apps from my phone except for your lap timer & SkyPro status tool, iOS is up to date.
I am currently restoring my phone after which I will try again?
The problem remains the same even without any of the above accessories.
Please Help, thanks for your time.