Apple TV 2 Rebooting too many times

I have a Apple TV 2 and it reboots just by scrolling through the video add on menu and after clicking on a movie it sometimes reboots after 4 mins. I uninstall XBMC and reinstall it and the same thing is happening. Sometimes I used the remote and scrolling through navi and watching a movie iyt sometimes reboot. I deleted the cached and same old issue.