I received my 2 new SXT 5HPnDs today. I followed the instructions at
http://www.wispforum.net/entry.php?5-Ho ... ode-Part-I.
I also ran into the same issue, once configured i could not get winBOX to connect to either of my SXTs, with the error "Could not connet to XX:XX:XX:XX:XX (port 20561) - timed out!" when trying to connect via mac.. there was another error for IP. i could still connect via telnet and ssh... until i tried to change the IP and got disconnected (oops!). I did a factory reset on both SXTs via the reset button and started the process again.
after the reset, i could reconnect winbox again via mac. the initial screen that came up asked if i wanted to erase the config, i chose to delete the inital config instead of just clicking ok. once completing the configuration again, i still have winbox acess.
hope that helps.