iPod/iPhone docking station

[Langers]

I got a gear4 docking station for Christmas for my iPhone and it's been working fine.

But, earlier I went to use it earlier and it won't play audio. When I plug it in, it will charge but won't play audio through the speakers. It used to come up with some message about cellular interfearance but it didn't earlier. If it makes any difference, I also synced my iPhone the other day for the first time since I got it.

Any ideas?