MBP and iTunes+wifi going crazy

[Medic278]

So I have a problem and am hoping someone here can help me out before I make a genius appointment. Obviously since I am posting this off my MBP I am connected to my wifi network. However while downloading some TV shows from iTunes all downloads unexpectedly stopped and I got a -50 error. iTunes was telling me that I had no network connection however I very much do. So I tried some trouble shooting, disconnecting and reconnecting, no luck. So I then tried disconnecting from wifi and connecting via bluetooth to my cell phone and using that connection. I was able to surf on safari and watch youtube videos however iTunes was still throwing out the -50 no connection codes. So I then restarted iTunes and still no luck. So I then exited iTunes and restarted the computer ran threw my various networks home wifi and cell and still had no luck at all. I also uninstalled and then reinstalled iTunes and still am completely out of luck. I was wondering if anyone had experienced a similar problem or can offer any insight or possible solution or if my best bet is to make a genius appointment.