The Intersense driver that searches across all ports often unfortunately mistakes other devices (especially USB devices) as a valid sensor. The workaround is to tell Vizard the port number on which the IC2 is plugged in. You do this by specifying PORT_INTERSE = XX before the call to add the intersense.dls.
Here's an example:
PHP Code:
PORT_INTERSENSE = 3
ori = viz.add('intersense.dls')
This would instruct Vizard to look on COM3 for the Intersense tracker. If you're using a USB-based IC2, you need to figure out which COM port that USB port is getting mapped to.
Please say if you need further assistance.