I have an HP photosmart 7550 printer that worked fine under XP. In order to get it to run under Vista you have to install drivers from a diffrent model printer and configure the port so it will print. I have done everything that HP specifies on their website but I still cannot get it to print. If I go into the menu on the LCD and calibrate the printer it prints fine for the calibration process. But if I try to print a test page or anything it will not print. The printer draws the paper through the printer and goes through the motions like it is going to print but nothing prints out. Any ideas as to what I can do to get it to print? All of the cartridges have plenty of ink in them.