Weird driver in win7

[denmark21m]

Hi i have 2 printer, Brother 6490 and a canon IP6000D, after i have installede win7 i have problems printing B/W, the print have a brown shine insted of black, any one can explain what is went wrong, if i make a B/W in the printer option its the same, i have succes change something last day so they could print perfekt, but after restart it went back to "brown" colour and i cant remember what i change

Mads, Denmark..........