I'm not totally positive on this one but.....

The keyboard should have software with it that you need to install and then program your keys to do the commands you want

If the keyboard came with the computer, in your control panel there should be an icon for the keyboard. From there, there should be a place to program the keys

?!?!? That was my best guess. I don't have experience with those types of keyboards...I work on a laptop....Good Luck!