Hey guys, I'm new to the forums but I need your help. I just bought a dock for my iPod and I wanted to connect the iPod to the iMac's internal speakers. And well i've tried nearly all I can think of. I went into the audio MIDI setup to get the sound playing on the imac's speakers. But in audio MIDI setup preferences the box labeled thru is grayed out. Is there anyway to un-gray this box? By the way I'm running OS X Leopard, latest version. I also included a screenshot of what the audio MIDI setup does, to make what I'm saying clearer.