Not the actual place lol the game ! lol.

I just got the game yesterday lol and already I'm having trouble . I'm in the beggining and its where the one of the guys on my team needs a level 1 security pass. And he sends me off to get it. When I arrive I find a severed hand that I can put onto the hand scanner . But when I put it on the scanner it just slides off LOL. I was wondering if anyone can help me and is there something I have to press in order to open the door while the hand is on the hand scanner. I'm using a P.C to play the game on.