Hard Drive no Longer Detected in PS2

[PS2Delight]

Hi everyone, I have a V4 NTSC console with the DMS4 Pro chip installed, which was running ToxicOS .1. I had installed a Maxtor 40GB hard drive in it and it was working fine, was formatted and everything, even ran a game from the HD after installing it and ran perfectly.

Now that I had installed the OS .2 version, all of a sudden now Toxic isnt able to detect my hard drive. I am not sure why this is. Even when loading the 1.31 version of the HDD Explorer, it also says it can't detect a drive connected to the PS2. Any reason on why this would occur, even after the fact that the HD worked fine before the OS .2 upgrade? The HD does spin up and everything, I just get the "Can not detect a HDD connected to the PS2" message. Any suggesstions would be appreciated.