Connecting Xbee to DUE using USB Explorer

I am trying to use a Xbee with a 7" TFT display with is driven by the CTE TFT LCD/SD Shield. I replaced the unstackable connectors on the TFT shield and installed stackable connectors. My Xbee shield that worked fine on the Arduino Mega and UNO does not seem to work on the DUE. I was wondering if anyone knows how I could use the Due USB port to connect the Xbee to the Due using a USB/Xbee explorer module.

Thanks

Kurt