got 3 cd pack to upgrade to version 5570.(audi q7)........mines at 4220, disc 1 stated :folowing devices are NOT in download mode: idc. what is this ? i continued with next device and did all 3 cds,cd 1 takes it from 4220-5150........then cd3 takes it to 5150 -5570,cd 2 did ok,cd 1 has got me baffled........i heard idc can be disabled,i read it on the net somewher,but it be ok if i knew what it is.....ive now got no sat nav ! any ideas?