CUPS Problem

[Arnaud Blanchard <arnaud.blanchard1@libertysurf.fr>]

Hello, 

I use a printer in network but CUPS doesn't work. When I use the printer 
manager and choose CUPS I receive the error message:
 
"Unable to retrieve the printer list. Error message received from manager:
Connection to CUPS server failed. Check that the CUPS server is correctly 
installed and running. Error: connection refused."

In the bottom of the window, I can see: "Connected to localhost: 631"

Thank you !