Trouble with PS2 DUo2SE chip

[20cobra01]

Greeting all and thanks in advance for any help that I can get from all of you. I just recently chipped my v4 no gap bios ps2. When I try to play my back up copy of GTA San Anderas I continue to get disc read errors. When I try to play my originals, I get a screen that says I can only play original format PS2/PS1 games. If I use the technique to disable the chip my originals play fine. I have checked the install 3 times now and everything looks good with a multimeter(no bridged connections). It is getting late so I will sleep on it tonight and give it another look in the morning. Can anyone help me out. How are the games suppose to act when you play back ups. Do you see the screen where you can go into the browser / config setting menu, while the game loads or should I be seeing something else. When I use the eject to turn the game on and put the back up in the tray and then use the reset to load the game I do see a sort of red screen flicker that I have not noticed before chipping the console. Do you think it may just be a bad back up of GTA, I used DVD decryptor in ISO Read then ISO write, I have seen some post about using the slowest write speed, does it matter. It seems to have burnt fine in the faster write speed. Sorry for the rambling but I have been up for some time now.