Epson CX78000 printing problem

Running OS 10.4.10 on !7 inch GHz Intel Core 2 Duo. Printer has been operating successfully when using G4 iMac (OX 10.4.10)+ USB. Switch to new iMac (also with USB) results in continuous printing of only blank sheets. When I switch back to the G4 no problem. Current drivers obtained from Epson website are loaded as the Epson CD does not work with Intel-Mac. I believe I've made all of the correct printer selections, with one step that I can't resolve. In the printer utility the CX7800 is selected, location is my computer but there is no CX7800 in the Epson list for Print Using. I've tried using Stylus CX6600 and CX8300 (both with the additional notation of Gimp-Print v 5.0.-beta 2) to no avail. In the G4 print utility the Print Using CX7800 had the designation of Series 1. I hope this description of the problem is clear. I've tried contacting Epson but so far no help. Any help would be appreciated.