sajijbara

hello
i need your help i hope that i will solve my problem
ihave audi a6 c6 2007
have a problem with my mmi 2g
in the geen menu i press in bootloader and i update the version
after the version was installed and every thing is ok
i press again in bootloader in the green menu
and cant do the update again becouse every some sec the system reboot and comeback to the bootloader
i buy a new mmi ecu that under the gloves box and change it
the system didnt work will the sound cutting in the radio and no sound in cd disks

i have the two ecu's
i hope that iwill recive some of help to my problem
in vcds
cannet read the control head with the old ecu that withe the bootloader reboting

in the second ecu vcds read but cut
after one sec

please help