My superdrive is acting strange and not reading disks. I insert any disk like normal and then it starts to spin and then there is alot of rapid clicking for about 5 seconds. It pauses then begins clicking again for another 5 or so seconds and stops. Then it simply ejects the disks. It doesn't eject them far though, I basically have to use my fingernails to tweezer the disk out, lest it gets sucked back in to start the whole cycle again. I repaired disk permissions and tried cleaning out the drive manually. Any suggestions for what to do next would be great. My macbook pro is a 15 inch mid 2009 version.