Illustrator won't stop scrolling when I use my tablet

Hi, forums!

I have two Bamboo tablets - a CTE-450/B and a CTE-650/S. I found the 650 in a thrift store, and I've had my 450 for years, but both are in good working order.  I haven't really used them with Illustrator CC, though, and when I sat down to try some inking the program sort of freaks out.  No matter which tablet I use, Illustrator just scrolls up, and up, and up.  If the stylus is near the tablet's surface, Illustrator scrolls up.  I can't do anything else - tapping the stylus registers as a right-click.

I've unplugged, tinkered, fiddled, and rebooted.  It doesn't matter what buttons I hold down on my keyboard, nor does Illustrator seem to care when I just hover the pen over the tablet.  It will *not* stop scrolling.  The *only* thing that seemed to work was a complete reinstall of my tablet drivers... until my computer went to sleep.  When I woke it up the next day, the problem was back.

I've followed a guide on disabling Windows Ink and using a configuration file to force Illustrator to use WinTab, but that hasn't corrected the problem.  I'd appreciate any help or guidance y'all can give - I just want to start inking some projects!  Thank you for taking the time to read this