bt/vc again

[Weird_iris]

hi there
im currently having trouble with my btvc and aux on my 08 tdci, it has all the indicators switch buttons and the bt module. and the module number is 8m5t-19g488-ak, but it was just connected by a 57pin(i forgot but many many pin, rectangle shape cable) cable, and there is other smaller port is connected by nothing.

my problem is the module seems not working, i press phone button on hu it just mute sound, and no response if press and hold the vc button on indicator switch. i tried to disconnect battery and fuse almost everything to reset hu and the module, but oddly the hu just came back to work without asking code or anything, all the pre-set stations are still there, i left the battery out overnight, still the same. i see many people have this problem but just cant find an answer.

what do you think about this., bluetooth module is broken?
if so is there upgrade model i can choose, or i only can stick with the ak module?.

im already bored to death for only can listen to the radio on road........
thanks