I have a Cano PIXMA iP1600 attached to a Netgear PS121 USB print server. The print server is attached by a USB cable to my router. I can print without too many problems from computers, all running Ubuntu 11.10, connected wirelessly to my local network using TurboPrint 2.22-2. However when I try to Show Ink Levels in the Toolbox I get the error message "Error - cannot get ink status." Is this a problem with the printer or am I missing something? When I run the TurboPrint Control Center as root (sudo turboprint) the same thing happens.