Graphic Tablet Users~

[Blaaaaaaaah]

Does anyone have this problem where they open photoshop, and when they draw a line using the tablet, it doesn't register the pressure of it and the line comes up in the same width the whole way through (as though you're using a mouse)?

It's starting to annoy me, because whenever that happens, I have to restart my photoshop to fix it (sometimes I have to restart it twice before it works) and reopening photoshop is slow on my comp sometimes.

I never change the settings of my tablet. It's been the way it is ever since I first started using it.

Halp plz. =[