My Internet connection or Wifi works perfectly fine for online gaming, but the app call of duty world at war zombies says your connection does not support online multiplayer what do I do want to play online?????

From Activision's website:
If you are having a problem connecting to an online game check the following:

• Make sure that you are playing in WiFi. This game will not work over 3G.
  
  
• Disable any firewall or security features on your router



• Set port forwarding on your router to the IP address of your iPhone/iPod Touch. This game uses ports 3074 and 3478 (UDP/TCP)
  
  - Place your iPhone/iPod Touch into the DMZ of your router
  
  - If your modem supports a wireless connection then try turning off the router and connect wirelessly directly to the modem. If it works regularly at this point something about your router may not be completely compatible with the specific needs of this game. Check with your router manufacturer for additional steps that may need to be done to resolve the issue you are having.
  
  NOTE: If setting port forwarding or DMZ helps your connection issue, you may want to assign your iPhone/iPod Touch a static IP address within your home network. This can help to ensure that the configurations you made do not need to be done again.
  
  NOTE: Many broadband internet modems are coming with routing capabilities built in. Please contact your internet service provider to determine if your internet modem has an integrated router. If it does, they should be able to assist you with the steps above for setting up your router.