Scanning with Epson multifunction cx6400 Suse 9.1

Any suggestions on how to get the scanning function to work? I believe I have the epson.conf and dll.conf files configured properly. The scanner is connected via usb (libusb). sane-find-scanner locates the scanner. scanimage -L also finds the scanner but identifies it as an epson PX-A650 flatbed scanner.

From both the command line and xsane, when I try to scan I get an error message "invalid argument"

I get the same result running as root or in a user account. Any and all suggestions and comments will be appreciated.