Android to Printer -EPSON R200

Hi, I recently got a smartphone and have been trying to set up an app called "printershare" and have been unsuccessful. My printer is supposed to be compatible with the software. When I scan for printers from my phone it never sees the printer. It does see the name of my PC but after I click on that workgroup it asks for a login and password, which I dont have.

Any help would be appreciated.

Thanks