Hi Duke,
I seem to have the same problem as segasaturn earlier.
Could this be the reason as you forgot to set the default name to attwifi?
You're looking into a windows script trying to solve router issue
The new version of the script sets the ssid, but only for the MACs which ssid is known, otherwise it will set the ssid set in WEB GUI, well it should do that.
Please tell me what SSID is configured in DD-WRT web gui and give me the output for
nvram show | grep ssid
It is possible that DD-WRT treats nvram values a little different so the default SSID i'm using is not the one set in the WEB GUI.