I have just replaced one of my ER707-M2 gateways with an ER7412-M2.  The setup went smoothly but I cannot seem to update to the latest firmware.  When it first came, up, it showed that there was an update available.  I told it to update and it ran through the process.  When it finished, it was not updated but it no longer showed up as being updatable.  I have since downloaded the firmware and usde the "Uplaod Firmware" feature in the contoller but it errors out any time I try to update it.