BeagleBone auto Reboots with Custom OS

I am using UART/TTY to load a custom OS onto my Beagle. After the OS has been loaded and booted to the new OS shell, then my BeagleBone will restart, and boot to Angstrom. I am able to use the new OS fro about 2 minutes before the reboot. Does anyone know if what I can do to fix this problem?

sounds like you need to disable the watchdog timer