I am newly introduced to photoshop. i m working on cs5 and using pressure sensitive tablet. the problem is sometimes PS does not recognize the tablet..when i try to adjust brush settings, there is "!" sign before opacity control option and it does not give me that pressure sensitive strokes even if tablet is plugged in. then sometimes after closing PS and reopening it, it works or it does not work.. i have to keep trying again and again... can anybody give me the solution? thanks ...