That's a mechanical failure of the drive. Look closely at it and search for a small hole, usually just above the open/close button. A pin inserted in there will cause the mechanism to release the drawer when the machine is powered on. Or consault with whomever made the drive - their support online.
While booted into EasyRE, you cannot eject the CD as EasyRE is loaded from it and requires it to run. This starts the second EasyRE begins to load (so past the boot menu from the CD). Make sure you eject the CD at your system's POST screen when the manufacturer's logo is showing.