DUO2 chip installation problems

[cyrax78]

Hi, I just finished installing a DUO2 modchip onn a v10, and everything seemed to have worked fine; however, no backups will work, it just keeps going to the "error reading disc" screen, but all of my originals work fine and the PS2 behaves exactly as it did without the modchip. I checked all the points with a magnifying glass before putting it together, and they seemed to be fine, any ideas what is going on? Also, I ordered the chip from modzone.com and it came in an envelope with almost not packaging whatsoever, could the chip have been damaged in transit? Thanks for your help guys.