I started playing my skylanders giants game that I stopped playing a while ago and when I try going to chapter 6 the secret vault of secrets it goes to the loading screen for about 20 seconds and then it turns black. It stays like that and I have tried turning the xbox 360 on and off but it still won't work and I have tried switching tvs and restarting the level but it won't work. Not sure what to do please help quickly!