Tweezers are not likely to help you. The disc will most likely be held in place by the CD mechanism. Your best bet here would be to have the disc removed by a professional, because it will probably involve stripping the unit and manually adjusting the mechanism to its eject mode, while at the same time releasing the disc from howsoever it is caught.
I suspect a DIY attempt may cause irrepairable damage.
Colin
January 2008
howtomendit.com for free repair help, information and advice.