In app purchase problem!

So I was just wondering if anyone has been having in app purchase problems. I wasn't having any issues but then all of a sudden itunes was unable to process my transactions. "Your purchase could not be completed" please contact iTunes support. I'm not having any issues buying other applications from iTunes, only from the Simpsons tapped out. I've tried turning my Ipad on and off, re-downloading the app, deleating cookies, checking my in app purchase settings.......It's enabled.....so not sure what is wrong.