So, when you hover the pen a certain distance from the tablet, its supposed to have a blue light. My blue light won't turn on until I touch the pen to the tablet, and I can't even use it like a mouse.
Try reinstalling the drivers or restart the services.
To restart the services, go to "Computer" and right click "Manage".
Then, click Services and Applications > Services. Type 'w' to get to the W sections (or you can scroll down to find it) and find "Wacom Professional Service". Click stop the service and then once it's stopped, click start.