Create a new level for a skill ?

Hi.
I'm trying to create a new level for a skill (sustain shot lv5). I use python for it and when i build the new skill.sdata i have 2 type of errors.
1) I only rebuild and i don't encrypt before import and got this :
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and data.saf/data.sah are dead i should use a copy or it don't work anymore.

2) I encrypt it before import and got this :
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But i can import back the old skill.sdata i had and it works.

I tryed to decrypt skill.sdata before import and got another error that i diden't SS since it's data file tool that give me the error.

What should i do for fix it ?
Thx for help.

i had the same error try to save it as is then import it as is i think i solved with this way :)

i'll try this. thx

EDIT: Not working :s