I don't know what's wrong with my Lexmark x1270 printer. I can't seem to install it?

I followed all the instructions on the big sheet that comes with it, uninstalled and reinstalled it, rebooted the hard drive, bought a new USB cable in case the problem rested with the old one, and when I try to print with it, I keep getting an error message saying basically the computer and printer can't talk to each other, to disconnect and reconnect the USB cable. Did that, no dice. I plugged the printer directly into a wall socket instead of a power bar, no difference. I do know there is a problem in device manager, where there is no USB printing support. I tried updating the driver for that and Windows won't update it, it says it's the best one available. I'm using XP Home and Lexmark is supported by XP.

I tried Lexmark tech support, they couldn't help me.

This is driving me crazy. How do I get USB printing support?