Wiz550web flashing

I am a newby with Wiz550web, just got it. I start it in my local net, everything is ok, but then I decided to flash it with a newest firmware
WIZ550web Firmware Binary (Direct download)
H/W Rev 1.1/1.2 & bin 2.0.0
And then I follow the tutorial from
After that only FTP available on wiz550web and no WebServer on it.
Should I do some additional steps?