Laptop dvd drive door will not open. I can not open my Compaq laptop dvd drive door any clue how

Question

I can not open my Compaq laptop dvd drive door any clue how to open? I have removed the drive from the laptop( toshiba model sd-r6252 )one day my driver got messed up. My dog wacked it,while it was open,and ever since i have had to press thew button and use my fingernails to open it all the way. It was sometimes hard to put the drive back in like it might stop halfay and u have to push it the rest of the way. Any way one day when i did it a little metal bar slid out. I have figured out where it goes. 1.i cant figue out how to get it all the way on there 2. i opened the case once but cant figure out how i did it.