check sum error in golf 6 vdo

[franavs]

hi i have problem with this dash , it show me error in the km for some second and later the millenage , i check the trouble and have checksum error , i tryed change the km with enigma tool and digiprog , all its the same , any help?
the ref of dash 5k0920870f vdo , memory 24c32
thanks in advance