Macbook Pro + Razer USB Keyboard Print Screen Key not Working

Hi,



I have a Macbook Pro and USB keyboard and I cannot print screen from the razer keyboard. I can from my MacBook pro. There is a "prt sc sys rq" key on the razer keyboard but it doesn't do anything. Window Key + Prt Sc Sys Rq does nothing. Window Key + Shift + S does nothing. I'm going crazy. I need help.