I Can't Upgrade Firmware For The Ez-B V4.X/2

Hi forum..,

i bought from HobbyKing 2(two) Ezb- v4 controller and i can't upgrade the firmware.

When i sellect the connect button i hear the connect sound but i can't sellect the upgrade button... Also, if i visit the web server (default is http://192.168.1.1) i saw that it's the old version..

Hope that i have explain correct my "problem".

Any Help Please? confused