I have a V12 PS2 Slim and have recently installed the DMS4 E.Z.I. S.E. modchip and even updated the BIOS to the new ToxicBIOS 1.4. But I still get the "invalid disc" error. I had to use my PS2 CD Boot Disc to load the BIOS disc in the first place. So my PS2 has been unable to read any disc other than what it originally could when I first bought it without first using a boot disc. Any suggestions, I have been trying to get it up and running for over 3 hours and can't think of what to do.