I have an Epson Workforce 840 printer. It will print from any computer on the network, I can make copies standing at the printer, but I cannot scan. I've tried scanning using a USB drive and by XSane on the computer. It says there's no scanner. How can I get the scanner to work? I've been a Ubuntu user for about 3 years, but have never tried to get a scanner to work.

The computer it is directly attached to is a brand new Wild Dog Ubuntu 12.04LTS I installed drivers for the Workforce 840 using the Workforce 840 .deb file