Getting push to work for facebook

Hi everyone, I am a new member on this website and I am havin trouble getting facebook notifications to work on my iphone5 here is what I have done so far. I went into the notifications and I hae facebook set to badges alerts and sounds. I also signed into the facebook under settings and I went into the facebook app and under notifications I went into mobile push and I made sure that everything was checked. I even removed and reinstalled the app. I hope that someone can help me thanks so much for your time. Corey