I am having some problems with my Nintendo DS. The games shake, some horribly bad. Two of my games, one that shaks really bad, and the other hardly shakes at all. Well they both froze within two hours of play. Now one of those two games, only froze one time so far, and I have played about six hours. The other one I have not played yet. Is this common? I mean at all? Do all DS games shake? About 90% of the games I purchase shake, and do not freeze. Please answer my question as soon as you can. Thank you for your time.