no solder modchip

[da_killz]

ive just got the no solder modchip for my ps2 (which is version 4)
i plugged it all in and it loaded with the original left in the drive, the memory card worked, the controller worked, played the game for a bit, on/off/reset button worked but the eject didnt work, took the chip out and wired the ps2 back up as original and it was fine, but whenever the chip is in it dont like ejecting, the chips not loose, is it a common problem or do i have a dodgy chip??