Tip of Pen Right-Clicks instead of Clicking

I need help sorting out some wierd interaction between these suspects:
my trackball, pen/tablet, Vista Home Premium (which includes the
tablet PC component), and ???

I'm having troublewith pen settings for my Wacom Intuos 2 graphics
tablet. I want the tip of the pen to 'click', but it insists on
invoking 'right click' despite the fact that the 'Wacom Tablet
Properties' utility shows that the tip is set to 'click - in fact
there are no other options for the tip setting.

I also have a Kensington Expert Mouse (trackball), and have checked
the checkbox 'Left Handed Button Swap' in 'Kensington MouseWorks Mouse
Properties.' I tried unchecking the box in case it was also effecting
the tablet pen, but it didn't solve the problem.

Thanks,
Teffy

P.S. In case you are wondering how I got MouseWorks to work with
Vista, the answer is here:
http://forums.techguy.org/windows-vi...rks-vista.html


Windows Vista Home Premium
ASUS P5B-E motherboard
XFX 7600GS 256M 2 DVI PCIE video card
Kensington Expert Mouse
Wacom Intuos 2 graphics tablet