I've never had this kind of problem before so I don't know wtf is going on. I've got my wireless connection that connects to my router and i got my LAN connection that goes from my computer to the X360. When I try to share the connection, I get some weird Ip conflict or something. On this same computer, I've made that Xbox-computer connection sharing twice and never had a problem. Btw, I just changed my router cause my other one stoped working (at least the wireless part). I reseted it but that didn't fix the problem.