Crossing City Folk Xbox

Won't let me connect to my friend on wi-fi?

I'm playing on Animal Crossing: Let's Go to the City (City Folk) and I'm on Nintendo Wi-fi trying to connect to my friend on the other end. I got an Xbox 360 and it lets me play online and everything but when we tried to connect to each other on Guitar Hero: World Tour it wouldn't let us :( So there must be something that is blocking my router from my friends router or something :(
Please Help!!!

The most likely answer is that your NAT type on your router is set to STRICT. The best setting is to have it on OPEN for online gaming.This will allow you to join more games and play with friends on xbox live.

Animal Crossing City Folk and Wii Speak Microphone Bundle Animal Crossing City Folk and Wii Speak Microphone Bundle

If you were given the keys to your own community, what would you do? Go fishing, collect shells or watch fireworks with friends? Build a snowman, exchange presents with family or decorate your house for the holidays? Take a trip to the city, go on a shopping spree or visit friends from all over the globe? In Animal Crossing: City Folk, life moves at a relaxed pace, but the world brims with endless possibilities...

Crossing City Folk Xbox