I am on live while choosing a map and a snow map will come up. The snow map will get chosen and the picture of the map will come up and start loading.When the white bar gets to the end all it will do is load. Just the loading circle and no words or anything will come up. I have let it sit there for hours and still nothing. I went to rent the black ops game end made the store clean the game disc before renting it. I took it home and installed the game like people told me to. The snow maps started working again and I was so happy that they were. It has been about two months since then and now they have started to not work again. Please help me fix this!