Hi, I tried upgrade a MK4 of a friend with a v27 and is this that hapened:

Load Cd with ignition in positin 1
Upgrade progress ok
First the display was white, for a long time.
Turned off ignition and screen appear but without navigation menu
Tried upgrade to v30 and mk4 power light is allways off, eject button flashes slowly and no navigation menu.
It loads CD it reads for 1min aprox and go out, but if I don't remove it in about 5secs it loads CD again and monitor shows allways menus but without navigation menu.

The navecoder says no I-Bus comunication!

What can I do?! I burn it?
I tried my 10 v29.1 Cd's and nothing happens.


Thanks in advance and sorry about my english