It says you have a high average ping, ive never got that message when there WASNT anything wrong with my net.
Last time i got the high ping message and kicked, i checked my speed on a website and it was something ridiculous like 200kbps(too slow for BF).
Exit the game, leave it a while then try again, 9 times out of ten it will be fine then.
I play 2142 by the way, never played bf2