i dont no im stuck too

i got it *****

How do i kill ireana morales on the level where quan has to hack he computer and Logan and
Michale have to defend him and stop him escaping?

you shoot them in the head or blow them up

Posted to an internet forum:
There is a glitch: if you are not quick enough to kill one of the terrorists that
positions himself near the stairs (he is part of the first wave of terrorists) , he will
run up the stairs! But as you all know, if you haven't been told to go up the stairs yet
and you go up there, you will fail! And if he goes up there, you will never be told to go
up there, because you haven't killed all the terrorists! Even if you walk too far away
from the computer (that is being hacked) you will fail. So you have to be quick to kill
them all before they can go hide too far away, and it seems like if you send Michael all
over the room too try and spot them, he dies every time because the two terrorists up on
the balcony (up the stairs) can't be killed unless you have been told to go up the
stairs!!!! I spent probably 6 hours trying to get past this part, but after analyzing what
was happening each time, I found these glitches! The best way to clear all these terroris
is to use smoke bombs to hide you and Michael and then use your thermal vision to
head-shot all the terrorists with your sniper rifle. It works every time. Just don't
forget about the guy next to the stairs!!!!! Also - DON'T use the fast rope that is up on
the balcony or go back down the stairs (once you have made it up there and cleared it) to
go back down to get ammo from the outer-room - you will "fail" and have to do the whole
thing over again!
____
I had this problem last night and I am positive it was a glitch in the game. I kept
killing the whole crowd and then waiting for about 5 minutes while nothing happened. I
would then run around the map trying to find someone hiding that I hadn't killed and when
I strayed to far it would give me the "you have failed to kill Irena message" and I would
have to restart. I played this for over an hour and nothing would work. Then I finally
figured out a way to do it. You need to have your player stay in the area right near the
computer. If you go up the stairs, you lose. If you wander too far away, you lose. So I
finally sent the guy that wasn't hacking the computer to go do the wandering for me. I
sent him back to the original door he came in and then he spotted some enemies on the deck
above. I then sent him to each side of the room until he found two more on the side of the
deck above me. After he had killed these people, then more finally started to fast rope
in. Apparently there was some glitch that was not allowing the people to fast rope. The
other handy thing was that after he killed the guys on the upper deck and we took out the
fast rope people, there was no one left to ambush me when I went up the stairs. Just
remember, send the third man. Don't go running around yourself or you will get the dreaded
game over.
P.S. I am writing this after the patch so I am not ruling out this being a new glitch.