Facebook contacts won't sync into phone contacts iOS 6
So I had all my Facebook contacts linked nicely with my phone. And yes I liked having everyone's information in my phone. But suddenly all my facebook contacts have disappeared from my contacts. I've tried togglying sync with contacts button and signing out and back in to Facebook, about 25 or so random facebook contacts have synced with the contacts but I want all 400+ names in there. How can I get all my Facebook contacts to sync into my phone contacts?
iOS 6.1.2