Lost RIGHT CLICK using Wacom Tablet in X5 only

I've had this issue for ages but have 'lived with it' but the more I need to use CorelDraw X5 the bigger the pain in the neck the issue becomes.

The tabket is a Wacom Intuos 3 an my pen is set up to have a right click for the lower side button, double click for the upper side button and single click for the nib. In all applications and Windows this works as expected but as soon as I run X5 I lose the right click and it takes several minutes to return after I have quit X5.

While using CorelDraw the only way to get a right click is to hold down the nib to bring up a pop up menu.

Is there a setting in the tablet driver (or CorelDraw?) that will stop this happening?