1.Turn On Your Xbox (Your xbox doesn't have to be off you can do this at dashboard when it has expired too), with no wireless adapter or ether-net cable connected.
2. Sign Out of your profile.
3. Load Up blacklight.
4. Press A to start and it should prompt you to log in, so log in still with no internet connection.
5. You go in the combat zone menu where you can select quick match or black ops do not select any of them.
6.Press the xbox guide button and connect to xbox live. Ta-Da your time limit has reset to 60 Minutes Enjoy!