I have been playing the halo reach beta and while playing invasion, sometimes i receive about 150 credits and sometimes i get as much as 550 credits. I have checked my games on bungie.net and compared 2 similar games, one going 32 and 6 and the other going 34 and 10, and in one i got 200 credits and in the other i got 573 credits. In one game i received a running riot, but does that warrant that huge difference in credits? thanks people

I have tried the magnet fix but it didn’t help and I get the message "the disc is unreadable" and another that says I need to put it in an xbox 360 console. If I open it ip my warrant is voided and I don’t want to send it away for the summer vacation.