FlashVars Problem - read in a Class

Hello,

I want to pass a Flash variable. I used FlashVars, as in this example http://www.tutoriales-flash.com/truco.php?id_truco=28.

I can read the variablesin the first frame, however I can not read these variables from my class, by_root.name_variable, the variable is blank:

Código :

public var isName:String = _root.name;

That I have it in my class.

any ideas?

thanks in advanced.