I got a cheiftec full tower case and a IC7-Max 3 motherboard... I cant seem to get the I/O shield out to install the IC7 I/O shield... I think thats whats its called... the piece of plate for the mouse, keyboard , USb, etc..... how do u remove the case I/O shield out? I tried yankin at it and such? Is it suppose to be removed???? arg help!