your challenges start over and your guns do also. the only thing that you keep is your clan tag and your playlists

only way u can is if you set it up in pregame lobby. other than that nuthin u can do. the 4 kills within 4 seconds of eachother is bull **** cuz thers only 5 people on each map in lone wolves so u gota kill them all without them killing eachother or you...

i can help with this. if you are using the same chord from a wired modem to your PC and xbox (switching them back and forth) then do this.

1. connect only the PC to the modem and on your PC go to start, run, then type cmd

2. then type ipconfig /all (space before the /

3. and write down the physical address of the PC.

4. on your 360 dashboard go to system, network settings, edit settings. go to the additional settings tab then advanced settings.

5. go to Alternate MAC adress and type your physical adress from your PC onto that line without dashes. then select done and then test xbox live.

hope that works i did the exact same thing to my xbox and now i run it off a router and it still works.