netmeter is a useless program if you are running vista or 7, they have built in programs to do it. hell it could even be causing network problems.
I'd also disable any security software you have and see what happens. TrendMicro & Microsoft security essentials are about the only userful ones out there, if you dont have either of them, it could be your security software fucking with game.
task manager > performance tab > resource monitor
sort networking by total bytes/second to see if something is using your connection
I would check your programs for 'pando media booster' which is a notorious game download streamer that ends up using your connection like a bit torrent and rapes your ping.