I have an iPhone 4 running the latest software 6.1.3 that hasn't been working correctly with my iHome iP90. Both devices are about two years old but stopped working correctly a couple months ago. When I connect my iPhone, no message about incompatibility appears, and it even charges correctly. But when I go to play my music I find that my volume bar disappears and therefore no sound will play out of my iHome. I've tried resetting both devices and that didn't fix it. Is this an issue of updated software making them incompatible or does anyone have any other ideas to help fix it?