Hi. I purchased some points and purchased Zombie Factory Premium Theme for 240 points. I want to play Der Riese. There is a check saying I purchased it and I now have 1360 points. I go to find match > nazi zombies > der riese and then it takes me back to the shop. I really do not know what to do as this is my first xbox 360. I have the 4GB xBox. My internet connection is good I can play 'Nacht der Untoten' online but I hate that map so much.