Browsing the list of supported printers I came to the conclusion that they might not have a driver for your model.
Don't worry, tell them : go to the same site, click on supported printers (left column) and then follow the link to the feedback page. They build drivers in 2-3 months if requested by users.
Another hint: visit
www.linuxprinting.org/printer_list.cgi or join their forum. Their info is a little bit out of dated but it's worth a try.