This is probably a mechanic error with the drive causing both problems. It may be possible to fix it but difficult, it's it within it's warranty period then send it back and replace it, if not buy another one and try and find someone into computers who's got time to fiddle with it to try and get it working. I can sometimes fix them, but it may well take more time to fix than is worth the cost of it (assuming work at UK minimum wage!)
grantpe, October 2007