Code not run when use external power

Hi everyone,

I am using MSP430G2 Launchpad to make strip LED effect, I used CCS to debug and flash to MCU, I have been facing with a strange problem, When I debug (press on resume button) my program work well, but I supply a external source, nothing happen. I have carefully measured voltage of external on board, it was fine. So my conclude is:

1. when I debug (USB power): program work.

2. when I plug out and plug in USB port of MSPG2, program did not work.

3. when I use external power: did not work.

4. I wonder about the program did not store on flash of MCU.

Please help to explain.

Thank in advance!