Okay, you will want to try the following:
-Uninstall the game and all of its components and files....basically clear it from the system
-reboot your modem/router, ensure this is done:
Most problems with the multiplayer portion of the game are related to routers or other connection sharing devices. Try these tips to improve you connection:
- Set up port forwarding on your router.
- Put your console into the DMZ of your router.
For more information on how to setup your router, please contact your router manufacturer.
Note: Some internet modems have a router built into the modem itself. To determine if you have a router/modem combination, please contact your internet service provider.
-Reinstall the game.
Sometimes something could have gone wonky with the update. A fresh do over usually resolves it.