Become a Legend difficulty change?

[mety]

Hi all, im new here and i hope you can help me, with my problem.

Im playing BAL and i want to change difficulty, but, how you know, i cant do it in the menu. So i downloaded PES 2010 Settings and tried to edit it with this program, but, when i click to "save", it shows me this error:

So i downloaded PES 2010 Become a legend editor, but with the same problem, when saving.

Please, can somebody help me, how to change difficulty (match level). thnx