Why can't I get Notification Alerts on my iPhone 4?

I have an Iphone 4 that's from AT&T but I have no sim card so my iphone 4 is jailbroken and since my iphone 4 is jailbroken I can't get no notification alerts from my email, twitter, pinger ect. I need help please does anyone know how to solve this problem? Also I'm in ios 5.1.1 btw I try everything like turning on my notification but nothing seems to solve the problem /

You have to remove the jailbreak. Mine does the same thing