I am trying to build the ble_app_hrs using gcc. It seems to build okay. I can program it to the device. When I press button 0 or any of the buttons the leds does nt light up. I have flashed the softdevice starting from version 7 to 5. None of them work. THe blink test program seems to work okay. I can see the LEDS blink. However the heart_rate_demo does not seem to work. Does anyone know why?