mmi update audi a6 3,2

[sakiss6]

i update my a6 c6 2005 model from 0.500 version to 21.20.( i download the files from internet).now i try to put 34.60 version but the files open as mdf or mds and cant read the cd that files.i order the audi original 1cd but it is for usa region and not for europe that i live so i tried to make a cd with files from 21.20 and files from u.s.a cd it start to update but update only the mmi hi file and all the others cant it writes you didnt selected any other device.how i selecte the device?any opinion on that ?