As one Photoshop programmer told me, "do not go on what other programs print, Photoshop has a unique Print dialog box with different programming calls. Sometimes these calls hit a bug in the print driver."
That said, be sure Photoshop CS4 is updated: Adobe - Photoshop : For Macintosh : Adobe Photoshop CS4 11.0.2 update - multiple languages
Let's start there and go to other steps afterwards.
Next if that did not work, you may want to try a clean uninstall and reinstall of your drivers:
Thanks for getting involved. I already installed fresh drivers today. And i just did the PS update.
Sent from my iPad
I read that you fresh installed the drivers, what I am not clear on is that you removed the Epson folder as part of the uninstall procedure.
Not doing that means that if the error is in that folder, reinstalling does not help.