Hi Sandor
Well known issue, see
https://supportforums.cisco.com/discussion/12714311/b200-m4-activation-failed
https://supportforums.cisco.com/discussion/12730866/which-firmware-version-has-board-controller-version-10-b200m4-blades
https://supportforums.cisco.com/discussion/12885751/board-controller-startup-version-not-updated-226e
https://supportforums.cisco.com/discussion/12746896/b200-m4-board-controller-activation-failed