Hi, I've got the internet coming in through cable, into a switch. From the switch the internet goes directly to the tower i am typing on and into an airport express. the airport express is for my iMac to wirelessly connect to the internet. Connected to the airport express is my printer. My iMac can print, my tower cannot. I believe this to be due to the fact that my tower is simply not connected to the airport express and is simply not on the same network. I don't have wireless for my tower. I am hoping to be able to travel from my tower, into my switch, out to my airport and gain access to my printer. Any ideas?? Thanks!