Xerox WorkCentre 6605V DN: directly scan from PC without USB cable...

Hi.
It's possible to scan directly from my PC via TWAIN driver/utility application with the printer without USB cable?
My WorkCentre 6605V DN it's connected via network only and when I use twain driver from photoshop, for example, I always have error "device not ready".
No problem by scanning from the printer to the PC with FTP method.
Thanks.
Ciao.