MXD files have to be imported using the "Import Device" command. Which is, honestly, not the most straight-forward process.
Right-click on the device tree, select "Import Device", and then select the MXD file. On the next window, click on the SANYO device in the left (people always forget to do this), then select a device position to assign it to on the right. Next, press the RIGHT arrow button which actives, click OK on the pop-up external devices window... and you should be good to go.