This probably isn't the right answer, but it's an easy thing to try. Try turning the print off, wait 10 secs or so, and then back on.... if you haven't tried that already.
I have an Epson 3800 connected by Ethernet, and was pulling my hair out trying to get it to work again after changing some settings. Had read all but the last line of the directions.... the line that said to power cycle the printer. Once I did that it was fine.
Good Luck.