How to browse mp3 directories [SOLVED]

[Joor12]

Hello,
I hope someone can help me figuring this out.

I can't browse the directories with mp3 files on my cd's in the cd changer.
Here is my setup:
- 4:3 monitor / display
- BM54
RAD Radio
Onderdeelnummer 6 976 963, versie HW 04, SW 43, gemaakt door Becker op 04/09 (januari 2009)
- cd changer
CDCD CD changer DIN
Onderdeelnummer 6 977 766, versie HW 40, SW 49, gemaakt door Alpine op 37/05 (september 2005)

It plays mp3's, ID3tags are displayed, everythig works fine, except for browsing the directories. So for exemple, when I want to listen to TR06-001 on CD1, I have to push the skip button from TR01-001 through TR05-19, and then one more time to get to TR06-001.

Came across a picture on bimmernav.com (see attachment) where there is clearly a way to browse to the desired directory.
Does anyone know the secret? Is it the 4:3 monitor I have, the CD changer, or am I just pressing the wrong buttons.

Thanks.