i bought a superdrive and put it in my crappy G4 and its worked for the last year or so, but as of last week, i put disks in and it tries to read them but justs makes a strange clicking noise. anyone know what may have caused it, or if there is anyway to fix it? i opened it up, and everything looks fine. ran the updater i needed to install for it to work originally. but it says it doesnt need it cause its up to date. profiler says it should be working. any ideas?