Auto option for BW

Hi,

I created a BlackandWhite adjustment layer in a layerSet. when I clicked the auto option in the property window, the default values has changed accordingly. While reviewing the log file (ScriptingListenerJS.log) i came to know the new values are specified. so i am unable to use this step to the next document because of the specified numbers.

is there any other methods to use the Auto Option of BLACKANDWHITE('BanW')?

thanks in advance,

rajiv.s