Plants vs Zombies Keeps disconnecting from EA servers

No matter what game mode i play i will always get disconnected and sent to the main menu where it tries to connect again. IT DOES THIS EVERY 2-3 GAMES. It's getting very frustrating because my brother has the same game at his house and doesnt get disconnected. I have tried resetting my modem and resetting my ps3. Turning media server off. Everything nothing works. On ps3