printing from LightZone

I have been using LightZone for Linux (build 6903) for some weeks now, and I am very satisfied. The only thing I cannot get to work is printing. When I try to print a photo the printer-dialog appears, and my printers seems to be recognized. The properties button for the printer however is greyed out. When I hit the print-button the cups-printer-icon appears in the gnome-panel, but nothing happens (printer stays off line). Cups printer status says: job-stopped. This happens on both my Cannon and Epson printer. Printing from Gimp and other programs works fine. I would like to print from LightZone  because of the color management support (which Gimp still doesn't have).
I am using Ubuntu Edgy. I have LightZone installed in my home directory. I have had it installed in /usr/local/bin/ as well, to see if that made any difference, but I encountered the same problem.
Any ideas?