I assume you are on 2010 version please confirm.
Is it showing on My Home network?
Make sure the iP address is allowed in Web and email protection / Firewall / connections
Do a search for xbox360 and xbox 360 here and see what is said I seem to remember several posts.
Thanks for answering first off, andI would like to know how I can find the IP of my xbox 360. and when I click add the options confuse me, I do not know the difference between IPv4 and ipv6
Actualy 1 way is if the box is shown in the My Home network pictorial clicking on it will show the IP. You also can setup it there to be called a gaming comsole. My son's 3 xboxes are show in the network and work fine.
Also to setup a static Ip address on your xbox see