I am getting frustrated with my Epson P-4000, which I had hoped to upgrade to use 2GB SD cards. I followed the instruction using at first the "Lexar" 133x cards, which Epson said on their page would not work for the upgrade. So I bought two others (Ritz, but still made by Lexar), and they did NOT say 133X. Still no joy when turning on the P-4000 and holding the "OK" button, and it still says "card has no data". Is the problem that the P-4000 won't read ANY Lexar cards, or is this upgrade just not going to work? Thanks in advance for any suggestions you might have.