Can anyone help me sync music on my new phone from my iTunes not my Windows Media Player?

I just bought a LG Chocolate Touch and I figured out how to sync my music onto it fairly quickly, but the problem is that it only lets me sync music from Windows Media Player (which I rarely use anymore) and not my iTunes. So unfortunately I can’t put any of the new music I have purchased on my phone. Can anyone tell me how I can get it to use iTunes instead of Windows? When I go on iTunes my device does not even show up on the side panel. I don’t know if this is more of a computer or phone problem, but either way if anyone could offer me some advice I would appreciate it!