most all changers have a manual eject. look on the bottom for a small 1/4" rectangle or sqaure opening and a hook like tab inside. either push or use a side to side action, that should release the cartridge. MAke sure the door is open
Also, some can be ejected by sliding a thin peice of cardboard (like a paper pad backing) just under the cartridge.
[Modified by STSProtege, 8:16 PM 3/28/2003]