Thank you for contacting Electronic Arts.
I apologise for any inconvenience caused to you.
Let’s first try to clear your console cache, this can sometimes cause issues with game. To remove these files, follow the steps mentioned at the below given link:
http://support.microsoft.com/kb/971755Delete game save files Xbox 360
Corrupted game files can sometimes cause a faulty online connection. To remove these files, follow the steps below:
1. Start your console with the game disc out so it launches into the Xbox Dashboard.
2. Select the System blade.
3. Select Memory and press the A button.
4. Select Games and press the A button.
5. Select your game and press the A button.
6. Delete all files for the game.
7. After following these steps re-launch the game and try to go online.
If you have any further questions please reply to this email.
Should you require further assistance about this or any Electronic Arts games in the future please visit our website and review our extensive Self Help knowledge base
https://help.ea.com/uk/Best Regards,
Electronic Arts - World Wide Customer Experience