Go to xerox.com drivers web site an chose the Xerox iGen 150 Press. You don't refer what front end are you using, but you have only two choices, Fiery or FFPrint Server. Make sure you chose the one you have.
Be sure to give out Kudos and select "Accept as Solution"
I work for tech support at RIT. My client owns an iGem 4 printer Diamond Edition. I searched online and could not find the necessary drivers anywhere. Could you please direct me to where the drivers are available?