Can't print from LapTop

::I have a printer connected via USB on my desktop computer running
vista Ultimate 32bit and I have a Laptop running Home Premium 32bit it
sees the printer cause its there on the printer's folder but when I try
to test a print page from the laptop it says its being sent to the
printer but nothing prints out. I know it works cause it worked when my
desktop had XP PROFESSIONAL installed which was like 3 weeks ago. My
desktop prints fine. I just need the laptop to print.:: ::By the way Im
sharing the printer from the desktop::