File Sharing + Printer Sharing (Changed Network Name and File Sharing Was Lost)

[killertofu]

I have a Mac Book Pro laptop running Snow Leopard that connects wirelessly. I also have a desktop Mac Pro running Leopard that is connected to the internet via WiFi as well as directly to the router. The desktop is connected to my printer.

I used to be able to file share without a problem and use the laptop to wirelessly print. Ever since I changed my WiFi network name, I haven't been able to wirelessly print from my laptop or share files. All of the share files settings are the same in System Preferences.

What's going on?! I need Help ASAP!

[killertofu]

P.S. I am not connected to an Airport. It's an AT&T U-Verse Router and both computers are now under the same network with the new name.