I recently purchased a MacBook Pro to take to college with me. Everything works great except that whenever I insert a disc with a program on it, for example Microsoft Office or Warcraft III, that type of thing, it makes a few attempts to read it and then spits it out. Every once in a while it will read the disc but more often than not it will just eject it. It reads CDs with music on them just fine. Any help would be greatly apprectiated! Thank you.