Default ExSlim 1.20

Hi everyone
Can someone help me?Why i don't have notifications from Facebook Messenger.They are activated but when someone sent me a message there aren't pop-ups I'm using ExSlim 1.20(with SSA) and some mods. 10x in advance
The next time you think you're perfect, try walking on water...

Phone : Samsung Galaxy S2 Plus GT-I9105P
Rom : Official Jelly-Bean (4.2.2)
Kernel : Stock
Recovery : Stock Recovery