I'm not 100% positive, but I don't think all versions of PS support pressure sensitivity. I bought a Wacom tablet a couple years ago and it came with a limited edition of PS 6, I think. I'm now using CS, and every version from then to now has worked fine. I guess the first question is, what version of PS are you using? Second, are all your tablet's drivers installed? After those, I'm not sure what else to check...
A tablet is a piece of hardware that you plug into your computer and you draw on it with a stylus pen, and the image is drawn on your computer. www.wacom.com
the problem is that I bought this new art tablet for my computer, and for some stupid reason, the drivers refuse to install properly, so there is no way for me to use the pressure sensitivity or angular sensitivity while drawing with it. I try to click the Tablet thing in my programs menu, but an error comes up that says "Tablet driver not found!"