Cant buy a champion shard?

It wont let me buy a champion shard even though I clearly have enough IP. I've made no other recent purchases, so I'm wondering whats going on... Here: http://firedragonwars.weebly.com/uploads/1/5/1/5/15155374/wontletmebuy.png Image if it doesnt load above Yes, Ive tried re-starting the client... didnt work...