iPhone 2G (A1203) Line-Out/RCA

[danzelc]

Hi all,
I currently use a docking line-out / RCA adapter to get great sound out of my iPod to my boat and home stereos. However, when I use the same line-out / RCA adapter with my iPhone 2G - the audio never makes it to the boat or home stereo. Instead, the audio comes out the iPhone speakers.

Any ideas on what might be the issue?

Thanks!