How will i open the back cover of nikon fm2?

I already move the lever and pull upward the rewind knob the back cover still won't open. Are there still other ways on how to open it?

You do know that you arent supposed to open the back cover of a digital camera right? Its the easiest and fastest way to void your warranty and will in fact ruin the camera.

There's a safety lock to prevent accidental opening, try the manual;

http://www.nikonusa.com/...ve/FM2.pdf.

The FM2 is a superb 35mm SLR, by the way, congratulations on your excellent taste.

Read #8 from this online manual.

http://www.mir.com.my/rb/photography/hardwares/classics/nikonfmseries/fm2n/fm2manual/index1.htm