Sorry I can't help with the problem with AW2000 itself, but I did get my zebra thermal printer installed with windows 7 with some help from this webpage
http://newsletter.solutionsgem.com/2010/02/05/zebra-printer-step-by-step-instruction-to-set-it-up-with-paypal-shipping-services.aspx

I know that the firmware also has to be uptodate on the printer itself or problems will result. Maybe you have already solved this problem though.