lock screen notifications don't show

hey, I have this problem with my z10 - it doesn't show no notifications on my lockscreen like it used to, you know, when I receive an e-mail, text or even upcoming event in my calendar, nothing.

I have lock screen notification on in settings. Where am I making the mistake?

Go back into settings and reverse the switch. Lock the device and send yourself an email from a PC. See if that does it.