I got a new tablet for Christmas, thanks to my fantastic husband!

We use Ubuntu (Linux) at home, and courtesy of our handy partition, also have Windows XP.  My new friend is super-easy Plug and Play, and at home it didn't take anything to get it to work.  Huzzah!

However, I'm at my office right now, trying to draw tomorrow's comic, and I can't get my lovely little tablet to work.  There are no drivers I need to install, the battery in the stylus is brand new, and my computer has recognised the new device.  But, whenever I try to draw something, only the mouse will control the cursor.

I'm pretty savvy, so this is pissing me off.  Ubuntu, generally, is a total pain in the bum to configure stuff with, but even IT worked without a problem, not to mention the version of Windows we have at home. 

I don't know why I don't just get myself a MacBook and call it a day.