HP Designjet 750

I setup a new computer for one of our users in our company. It has Windows 2000 and Office 2000. I installed the service releases for both Windows and Office. He tries to print to a designjet 750 for printing big presentation boards. When he prints a PowerPoint presentation in Windows 98, the board comes out perfect. When he prints it in Windows 2000, there’s seems to be a ton of excess ink on the printout. I have Office 2000 on the Windows 2000 machine and Office 97 on Windows 98 machine. Any ideas?