Add a network printer on a windows network to a Macbook Pro?

I'm trying to print to a printer on a Windows network. I can add them and even get toner levels. But when sending a print, nothing happens.

What am I doing wrong or missing?

Here's a little more info on what I'm seeing and what I have to do to get it working...

I see the printers, and can add them through the basic adding method.

But when adding them that way, it doesn't send the print. Well actually, it shows a brief progress bar like it sent it, but nothing is ever in the queue. And nothing prints.

What I ended up having to do is add the printers by IP address. I then edited the printer names to reflect where they are in the office to make identifying them easier.

What would be the reason that they would show up in the list, you can add them, but can't actually print to them?