Thank for your answer, I already done the force update procedure two times.
I even did a BIOS reset to default after the first try, but it did not helped.
Were you able to update the BMC in force update mode?
The messages from the BMC update looks the same in both jumper position.
I will make a photo of the update in both jumper position and post it here.
I had an idea maybe the the fw update is not correctly transfered to the pendrive, so this time I will compare the files on it.
I did not correctly transfer the update files to the pendrive. I made a new one which I double checked with file compare.
And it worked first time even without force update.
Maybe I did not disconnected the usb drive properly after copying the updates first time.
I really lucky I did not crash the mainboard with a corrupt update.
The lesson is: always check the copied files with file compare before applying an update.
Thank ghoti for the suggestions.