Microsoft has rolled out a new system update today dashboard number 2.0.17150.0. With this new update rolled out this means you will not be able to play on xbox live via xblse services. We currently have reports that the update isn't affecting users using LT3 or Xkeys more information on that can be found here. http://www.xpgamesaves.com/topic/115569-xbox-360-dash-update-20171500-lt-30-info/ We will update you once we have more information on the update and information on a new XeBuild to update your JTAG / RGH to the most recent dashboard.
Xebuild 17150 is now out to solve this issue it can be found here http://www.xpgamesaves.com/topic/115592-xebuild-dash-17150/