BMW e91 318d read write EDC17 c41 DDE8 error with KESS V2

Problem:
I have problems with my Kess V2 and need help.

I try my BMW e91 318d read and write EDC17 c41 DDE8.

Step 1 with OBD connector – TOOL – OBD2DATA I can do, no problem, everything is OK.
Problem Number 1.

Step 2 boot loader with backup read – many communication problems -> Crash! After many attempts, I was able to read backup!

Step 3 with Flash boot loader (ECU) read – many communication problems -> Abort, abort, abort! After many attempts, I was able to read original file but in the end came problem # 2 -> Checksum error.

I am using Windows XP sp2 with visual-c …, Microsoft. NET Framework 4
Internet was always as KESS V2 was executed.

We have attached a log file and some pictures.

Please help, thank you.

Solution:
It means KESS V2 can’t read and write this type of ECU, ECUs on the same car model in different areas are sometimes encrypted in different ways, and therefore the tool cannot always work on the same car model.