Hi, I bought GTA San Andreas the other day, put it into my xboxs disc drive and sat down waiting for it to load, but suddenly it came up with an error!! something about the disc being dirty or damaged, but it was brand new so it can't have been damaged and i had only just taken it out the box! None of my other games did this and i ended up going back to the shop and exchanging it for an other copy of GTA SA, I tried again but the same happens, it loads to the starting video then an error accures! I think it may be something to do with the laser lense but i don't know what i can do about it? Has anyone got any suggestions???