Printer is disabled

I have a problem with my HP Photosmart C4180 All-in-one: when I print something, nothing happens.
When I go to Control Panel -> Printers and Faxes, it is disabled:

Why?
And how to solve this?
thank you

sure the cable is disconnected or poorly connected

See this similar problem : http://forums.techarena.in/vista-print-fax/777976.htm

And here is a Guide : http://forums.techarena.in/guides-tutorials/1093966.htm

gpedit.msc User configuration/admin template gives many options to set the start menu config: