I have a jailbroken Iphone 3GS running version 4.1 I am having problems seeing any video when plugged into a pioneer cable on my screen. I have taken it in to car toys and they tested out a 4th generation iPod and the video worked fine. They said that there is something within my setting of my iPhone that is not allowing me to see the video on my screen. I cannot find anything to change any sort of settings. Please help me out any way you can!!!