Firefly, Servos, Arduino Mega

I am trying to control 30 servos with Arduino Mega 2560 but it seems the servos only twitch as I slide through 0-180 to mega write, the output shows lown at 0, and high when the number is bigger than 0.

here are the tests and results I got working with Firefly and Firmata:

- connected 30 servos with external power and mega sensor shield, servos twitch.

- connected 1 servo to different digital pins in several times, servo twitches.

- connected 9 servos to Uno under the same setting, all servos functioned well.

and here is the test I conducted with Mega and Arduino IDE:

- sketched in Arduino IDE to have the servo/s turn 0-180 degrees, servo/s functioned well.

As a conclusion, the Mega board is functional, and Firefly works well with Uno, but not Mega.

I thought something must be missing from firefly and firmatta for mega to communicate with servos, and I came across this post in 2011:  http://fireflylabs.squarespace.com/discussions/post/1540044

the Firefly version I'm using is 1.0.0.70 64 bit, has anyone successfully controlled servos with Mega and the newest Firefly? 

Attached is the gh. definition