My lockscreen has gone

Hi. Since ive attached the flip case to my BlackBerry I've lost the lock screen.

Even if I keep the flap open, turn off the screen with the power button then turn it back on again, there is no lock screen.

This causes a couple of problems. I lose the ability to see what messages have arrived and I can't find a way of putting the phone into nite mode.

Is it normal to loose the lockscreen when attaching this type of case?

I would remove the case to see if the lockscreen reappears but I will be dammed of I can find a way to get my phone detached away from the case.

Posted with my Z30

It's normal, the phone detects when the cover is opened and will unlock the device.
Put a password if you need the lock screen

Posted via Z10