My Gimp is having problems?!?

Recently, I got a Bamboo Drawing tablet, and I LOVE it. It makes everything so much easier. But whenever I try to use it on Gimp, it won't respond. If I use the mouse, I can paint, and it works on Windows 7 Paint as well. I need to use Gimp for the layers, but my tablet refuses to work there! I haven't found anything like this when I searched it. I use Windows 7, someone please help!