restart your PC, or unplug it for a few seconds.

^^; get a new tablet? I do remember this issue before.

But I dun haff zee monies D:

I know XD; But I did offer you a tablet that I have which hasn't ever been used xD; you never got back to me about it X3;

Well I wish I knew the answer, but I own a Wacom tablet ^^;

Did a bit of searching for you:

It could be that the tablet drivers do not work with the version of photoshop you are using, especially if it's CS4.
Seems that Trust needs to release a new driver to fix that. (-_-)
They HAVE promised a new driver soon, and 3.30 is the latest driver I could find, have you got that one?

I also found out that the drivers for the Genius brand should be the same as for Trust, so If Genius has a more recent driver you could try to install that. (Could be risky, results seem to vary).

And also found this on Adobe forums:

"I've found that the problem can be *fixed* in CS4 by double-clicking on the taskbar Trust Tablet Control Panel icon for the tablet, going to the "Pressure" tab, and clicking anywhere on the Pressure Test area. Switch back to CS4 and everything is back to normal."

Does not mean much to me since I don't have a trust tablet, but maybe it works for you too? (^_^)