Hi this is my first time using this form i recently purchased a F-700BT for my 2008 Toyota Tacoma Double-Cab as my first Double-Din head unit. Happy so far with the head unit and Navi works great. However after ordering I-pod adapter the CD-IU230V my ipod works however i am only getting sound out of my back speakers and i turn the volume up or down and nothing happens. However when i have the radio on or a CD in i get sound in all speakers. What could be wrong? Could I have pluged the Audio cables in the wrong place?