i have the z120bt and i was told the cd-iu50v ipod cable was discontinued but the Pioneer CD-IU51V was in stock. im not seeing the Pioneer CD-IU51V being compatible with z120bt unit but yet the cable looks exactly the same? will it work on my 120bt? i seem to be getting in and out poor sound quality only through the ipod so im thinking it could be the pac ipod cable or ipod itself. shop that installed it wont help me because it was my own unit and they dont support pioneer. thanks