Airport Extreme Problem

I have purchased an airport extreme. I am using it as the router connected to my windows desktop. The internet works fine, but the printing is the problem. I have somehow set it up so that I am able to print wirelessly from my macbook but I am not able to print from my windows desktop (where the airport is connected). My printer is connected in the back to my airport extreme. If anyone knows what I am doing wrong, please help! Thanks so much.

Download Bonjour for Windows.
And also, make sure printer sharing is set up on the PC.

Yes, I have done this. IT still does not come out on my windows computer, but I am able to print wirelessly from my macbook. Whenever I run bonjour, it simply creates another copy of teh same printer with a (2) and it still does not work