Why is My Epson Worforce-pro WF-8510dwf Inkjet Printer Pretending It is Printing the Queue?

Hello I have a Epson Worforce-Pro WF-8510DWF inkjet printer. I have put a new WiFi network & router into my office. I now can't get my printer to print any documents. I am trying to connect by WiFi. Strangely the PC can trigger a nozzle check printout but not any kind of document. e.g. Every time I try to print a simple text file, the Printer initially comes up with 1 document pending, and then, WITHOUT being printed, the document pending goes to "0" ! i.e. Documents appear in the queue for about 30 second and then for no reason, and with any noise from the printer itself, the queue disappears! I have just reinstalled ALL the epson software. Any thoughts? J