Topic: Access to Priviledged Calls

I have applied the mentioned "security bypass":

1) Create the file /psp/flashplayer.cfg
2) Add the following line:
PrivilegedCallExceptions=65535
3) Reboot

and I am trying to create a file in the /tmp directory.  I cannot get it to work.  The AS code that I tried is:

var _putFile:Function;
_putFile = ASnative(5,51);
_putFile('/tmp/test', '1');

I load this to my Chumby and check /tmp -> no joy.

What am I doing wrong?  Thanks for any help that you can provide.