WA Blademaster III help
 

I'm looking for some help disassembling a WA Beretta blademaster III. I can't get the slide off. I've removed the screw from the bottom of compensator, but the takedown lever is giving me trouble. I press the button on the right of the frame, but the lever won't move down to 90 degrees like I assume it should. If anyone has any tips as to why a Beretta slide won't come off, or any info on this pistol, it would help me greatly.