I think that your problem is that you are using your Epson printing software (dedicated to Epson printers) to print out on your Laserjet. The software will send out dedicated Epson codes to set up an Epson printer before actually starting the printing and these will be gibberish to the laserjet producing the results you are getting. You need to get the appropriate software which will almost certainly be on your laserjet installation disk if not already stored somewhare on your hard drive.
It is of course possible that when you installed your Epson drivers, the installation disk overwrote your laserjet photo printing software thus the laserjet disc will be needed to restore this.
P.P.