Q: My system goes to sleep or resets once CE has booted completely.
JP5 (sleep voltage selector) may not be set correctly. Make sure that the voltage selected always has power applied to it. If you do not have an external, "permanent" power source connected to pin 6 of J5, set JP5 to 2-3 to use the 5V input power.
Your 5V power may be dropping out of regulation under load. Make sure the 5V power input isn't any lower than 4.75V