1) It's possible there's a problem with the connection... if you're using a low-bandwidth connection...
2) If you're using a proxy...
3) If you're on a network and don't have a direct IP address...
Unfortunately, we can't help you with that...
So, if there's no real IP address, nothing will work? And isn't Hamachi a program specifically designed to create a real IP address and emulate a local network?