How to fix a bug on a mission to find weapons Dolgovtsa? (S.T.A.L.K.E.R.: Shadow of Chernobyl)

HOLMS32
The Abakan is a gang of Pigeons. Maybe you are that gangster already sent to the hereafter, and utomat sold, so the member considers and does not job. But this is only conjecture about completed the quest to obtain it.