Level "Drawn" (in german "unentschieden")

[Bowe]

how can i get further? in the special mental echo mode (after touching the dead guy) i have to pick up a wrench/spanner to relase the ladder. the i can get up but what to do then? the guy on the 2nd floor shoots me every time and the switch is also not active in this mode. the other guy alway climbs up ad ist shot. do i have to stop this guy? and when yes -how?
thx in advance