sash system open_window

[bumxd 16]

hi, i have problem with panel where can add bonuses on sash from weapon or armor: panel open, but i can`t put weapon or sash in it`s slots.. where can be problem?

p.s: im about this panel:

when 20406.chat."Aufnahme von Boni" begin
            say_title(mob_name(20406))
            say("")
            say("Do you want to absorb bonuses from your weapon")
            say("or amour?")
            say("")
            local confirm = select("Ja", "Abbrechen")
            if confirm == 2 then
                return
            end
            
            setskin(NOWINDOW)
            pc.open_sash(false)
        end
    end
end