OKay..so I followed this tutorial on RayWenderlich.com about setting up push notifications in an app. It worked fine for the 1st week or so. The notifications were delivered and all was cool until today, when notifications stopped working. I repeated the steps mentioned on the site by creating a new SSL certificate, a new provisioning profile, etc but it still doesn't work. The Settings and all in my iPhone are set to receive notifications in the App. 

I tried sending myself notifications from other services like FB, twitter, etc and they're all working. Can anyone temme what might not be working. 

Oh and btw, my PHP code shows no error. In fact, it says that the message was successfully delivered.

I'm running out of time and help would be much appreciated. Thanks.