Also whenever I set it to screen, if I click on like, core pointer and come back, it's recast to disabled? Not sure if that's normal

I have a huion graphics tablet, I downloaded inkscape 0.91 yesterday onto my prop that's running snow leopard, the pressure sensitivity works in other programs, but even though every time I open inkscape I go under input devices and set it's state to enabled, the pressure sensitivity won't work. Any...