go get "pingplotter" its a free program (google it) install it, then typ in the address for the main game severs. ( the address can be found in the "stiky" post at the top of the Technical support thread..
Run ping plotter for 5-10 mins pinging the servers every few seconds. You are looking for a nice steady ping, under 200ms. If you have something else, post a screen shot of the ping plot and maybe one of the gurus here can help you track down the problem.