can anyone advice how to get back the screen lock?
My galaxy tab screen lock suddenly dissapear.
It will come back if I activate the screen lock with pin then set back to non again. but after using and close some apps/clear memory, the lock screen will dissapear again.

Previously, even I use taskkiller/clear memory (task manager), there is no problem with screen lock.

I have tried to connect to Kies as suggested by some blog, but it still dont fix the problem.

Need expert help, pls... :' (

anyone experience this before?