Huion H640P doesn't work with Photoshop CS6.

Hi. I just bought the H640P model and so far its been working fine with other software (SAI, Krita, Medibang) except Photoshop. CS6 just doesn't detect the device, I guess? I can't even hover over the menu, etc. I have tried reinstalling the latest H640P driver from the site, disabling Windows Ink, even installed an older version of the Huion driver just to see if that would work, but none did. I've checked threads with similar problems but none really helped me fix this problem. I wonder if the H640P is just not compatible with CS6? ...That would suck. Aaaaaaaaaaaaaa.