bluetooth installed working fine but cd changer option now greyed out ? any ideas

hi guys

i have just had the bluetooth module fitted to my audi A4 B7 2.0T S LINE SPECIAL EDITION

i have the multi function steering wheel and sat nav plus +

all works perfect voice commands ect ect radio works the sd cards play ect ect

but the 6 cd changer that is in the glove compartment is greyed out now ?

if i open the glove compartment the cd changer is working as i can take out cds and load cds.

the guy who fitted it thought it was a coding problem and has come back round but he has told me it is coded correctly.

so he has gone off to find out more info ,he has told me the only thing he can think of is the k line ? what ever that is lol

this is what i had installed

http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWNX:IT

they also sent the below links for instructions on fitting which the guy i assume followed

http://www.carsystems.pl/pages/pl/left-menu/support/bluetooth/audi-rns-e-coding.php


http://www.carsystems.pl/pages/pl/left-menu/support/bluetooth/audi-installation-manual.php


http://www.carsystems.pl/pages/pl/left-menu/support/audi-8p0-862-335-s-aa.php

so can anyone shed any light on the problem or has anyone had this problem ?