Im playing Splinter Cell Double agent, if people have played it, they will know why Im struggling, 2 points on mission.

Mission 6 [NYC – JBA HQ – Part 2]

Assembling the mines for Kinshasa, is bloody hard, I cant do it, even my kids cant do it, if I ignore it, record voices and then go in the door, up the stairs to the room Enrica is in, this hack to get through is only 15 secs, to quick for me, so again Im stuck, is there a way I can change those setting.
Thanks.