You could try to see what the stats are for your Lightstone device as perhaps it use different Vendor & product IDs. The HyperNext Lightstone demo uses hardwired IDs that worked with the older Lightstone devices so it might just not be able to open your device.
Use the USBVendorListFN and USBProductListFN functiions to get the IDs for all the devices connected to your USB ports.
