fix Xbox or get rid of game?

[Brian H]

i play two games one game can play all day (modern warfare 2) the next day after a break from Xbox i put in this other game (Ncaa football 09) and in twenty mins i get red rings so i think its still overheated so i take the Xbox unplug it and let it sit next day same thing with the football game 2 red rings what's wrong with my Xbox and should i get rid of game or send Xbox in