The spring that helps to ejects the tray may be broken. You might have to remove it and disassemble to check - or just buy a replacement. They're cheap enough.
1| Make and model of your laptop?
2| Can you state if there was a disc caught in the drive sled or are you simply trying to pry open the optical drive's sled?
The spring that helps to ejects the tray may be broken. You might have to remove it and disassemble to check - or just buy a replacement. They're cheap enough.