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I would suggest that you review the following solution which was found on our Phaser 6600 Support & Drivers site. There are also many helpful videos there, which could clarify solution steps.
If that does not resolve your issue you may consider contacting our specific product support experts for customers in the USA at the following link: Fast Track to the Expert
If you are outside the USA you should contact the local support center in your area which you can find here: