hidden and dangerous 2

i am stuck on the very first part of estate agent as i cant hand over papers before i am shot by the first guard on the level if anyone could help it would be much appreciated

you've gotta run fast the room with the guy in it your after is on the porch the first door to the right he'll close a secret entrance there's three in total if i can remember but the one you see him closing just has a few wine bottles

you can't fire a shot in this level until towards the end but you can stab people with your knife. but hide the body

also a little tip the higher the difficuty setting eg. put it on call of duty when making a new user and the affects are better(they bleed all over the place, much better ragdoll effects)