@JOJOJO(View Post) 602 means "Server not found", it is a client-side error.
It sounds like you are having network (specifically DNS) issues on your end. Double check your network, make sure you aren't using any software on your computer that interferes with your network.
I'm using an older computer with a wifi adapter. It allows me to access the internet but i cant access the servers without getting a 602. The software is NETGEAR WNA3100 GENIE.