Xerox 8550 prints only black and white

Problem: It's 64bit Windows and drivers are downloaded from Xerox

This instructions helped:
http://www.sevenforums.com/drivers/67344-w7-xerox-8550-now-b-w.html

Printer options change are available to select from drop-down menu only as administrator.

First, select printer in options,
then vivid color in printing preferences.