Something's wrong with itunes? I just cant sign in

[alextangweihao]

Why can't i sign in my itunes account? Or should i say cant connect to itunes store to purchase songs and apps?

I entered my Apple ID and password correctly then click 'sign in', but after a while of connecting, a message pop out says 'We could not complete your Itunes Store request. Make sure your network settings are correct and your network connection is active, then try again' (tried so many times-- AGAIN!!!)

My internet works fine. I browse all website seamlessly and use itunes smoothly (viewing(only) all songs, apps, etc). But I just can't sign in to buy.

I'd tried signing in many times and restarted my itunes and PC but still don't work(Successful diagnostics).. What should i do?