i have a lot of issues with xbox live, before this it was always my nat type that was closed. after some reconfiguring (twenty times or so) i still have one problem.
i can not join live parties or send live party invites. also recieving any messages and invites is not working. also here on the site i don't get the messages of xbox live.
what i did try to solf it:: reboot my xbox and clear my case of my HDD. i use an xbox elite. so not theslim version. i hope i get some more options to try out.maybe a system reset works?"