Embedded FFX applied incorrectly

Hello,
I am trying to apply a embedded FFX preset of Extractor with preselected channels (otherwise I cannot access the channels via script).
I am using slighly changled version of Render Tom's code for importing ffx from binary string 
and when I apply the effect, it loses channels settings, while applying manually the ffx file itself works fine
what can be the problem?
Here is my piece of code