Gender Selection Screen error

Hello, I'm trying to use this script

http://www.pokecommunity.com/showthread.php?p=7790869#post7790869

of selecion of character as black and wite

but I get this error, I do not bad

Exception: RuntimeError
Message: Script error within event 1, map 1 (Intro):
Exception: SyntaxError
Message: (eval)in `pbExecuteScript'compile error
(eval) syntax error
***Full script:
scene=GenderPickScene.new
screen=GenderPick.new(scene)
screen.pbStartScreen.


Interpreter:276:in `pbExecuteScript'
Interpreter:1600:in `command_355'
Interpreter:494:in `execute_command'
Interpreter:193:in `update'
Interpreter:106:in `loop'
Interpreter:198:in `update'
Scene_Map:103:in `update'
Scene_Map:101:in `loop'
Scene_Map:114:in `update'
Scene_Map:68:in `main'



I do not understand is how to put this

scene=GenderPickScene.new
screen=GenderPick.new(scene)
screen.pbStartScreen

Have you added the script to the script's editor?
Have you put the three lines into the same call script command?
Check that there isn't any point after screen.pbStartScreen