CD/DVD combo tray won't open, please help

Well I just finished building my first PC and everything seems to be working except my Lite-On CDRW/DVD combo drive. I've hooked everything up correctly as far as I can tell and the LED is lit up on the front, but when I press the eject button the tray will not open.

Does anyone have any sugestions or similar experiences?

Thanks in advance.

<P ID="edit"><FONT SIZE=-1><EM>Edited by 12th_man on 08/11/03 10:53 PM.</EM></FONT></P>