QTR-Quadtone RIP

hello, I try to looking for some topic about this but I did'd found nothing about it.

I've just done the installation of quadtone 2.6.1 for mac osx 10.4.11.

My printer is stylus photo R285. Into the profile folder this model is colled R280, the 
american name of the same epson pinter.

My problem is that when I open the printer dialog I cannot see "curve" into the selector of 
the quadtone rip interface
. The totorial said to run the script that I found into the profile folder of my printer but the 
script report me this message:

Cannot find an Epson USB printer with the name R280

The printer must be turned on, plugged in to computer and ready
Resetting the printer may be necessary.

The firewire port cannot be used for QuadToneRIP.  If you are already using
firewire you must switch over to USB.  Do not plug in both USB and firewire.

For network printers, please enter an IPP address for your printer.
The address is a 4 part number such as 192.38.103.34
Enter IPP number or <return> to cancel:  

My printer is torned on and plgged to the computer.

Could be unsupported print model to couse the problem?