Hi, I have, what looks like, the older version of the TL-WR940n.  It is a white router with 3 antennas, not the newer black model. I have NO idea why the newer black one has the exact same model number as my older white router??? lol   Anways, I downloaded the firmware, v4, from the us TPlink site, and got the error 18005.   I went to the Canadian TPlink site, and there is NO version 4 firmware listed.  However, on the Candian TPlink site, there are firmware download links for all of the other versions, 1 thru 6, excluding 4? 

Is there no Firmware upgrades for this older router, version 4?  

Again, the code i'm getting is 18005.  Thanks