Hi Adam,
I suspect you are using a newer version of Vizard with a driver PPT driver that is no longer competible with the PPT1.1
(the newer drivers that now come with Vizard by default are for PPTX2 and PPTX4).
Please follow the instructions in forum post
WorldViz User Forum > Precision Position Tracker (PPT) > running PPT 1.1 with Vizard 2.12 or higher
http://www.worldviz.com/forum/showth...3?threadid=103
Hope that helps, please let me know.
Matthias