If it won't print when directly plugged into the printer then it won't through the network either.
Try: Checking the print queue (double click the printer icon). If there are a mass of jobs waiting , right click and select cancel all jobs. When the print list is clear, right click the printer icon and select properties. Now click on test print.
If it still doesn't print un-install the Epson printer software from the control and then re-install