Print Server


I am using a Canon MX274 WiFi connected printer on a Galaxy S5
I have had the printer working by using settings>printing.
I note that there were both a Canon Server and a Samsung server.
Should I have both enabled?

Often when I go to print I get the Message "This printer not available", other times straight thru. I think it requires a new selection of my printer, but it may be just a delay before it is ready

Any advice greatly appreciated.