Mercury-CroweFeatured By OwnerJan 4, 2013Professional Artisan Crafter
Have you tried reinstalling the drivers, or getting a newer/older version? That's fixed pretty much any problem I've ever had with my tablet.
There is also the possibility that the pen and mouse are just ruined, even if they are getting power. Maybe something inside there got corrupted. If putting new drivers on there doesn't work then you might just need a new pen and mouse.