Where did you get that driver? What model is it actually for and what version is it?
That option doesn't exist in the GPD (PS and PCL) or the native PS or PCL driver (Win 7 x86), which may be why it is grayed out.
It is possible, but unlikely, that Acrobat is the issue, it may be controlling color. So check that Let Printer determine Color is selected.
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for posts that resolve your issues. Your feedback counts!Joe Arseneau