LAUNCHXL-F280049C: Can't erase and program device while device is locked.

I got the following problem. When the device is locked I can't erase and program flash.

 Everything is in Zone1 and nothing is exeonly.

If I runt his code. Copied from example code:

void flash_test(void)
{
    Fapi_StatusType oReturnCheck;
    volatile Fapi_FlashStatusType oFlashStatus;
    Fapi_FlashStatusWordType oFlashStatusWord;

    EALLOW;
    oReturnCheck = Fapi_initializeAPI(F021_CPU0_BASE_ADDRESS, 100);

    if(oReturnCheck != Fapi_Status_Success)
    {
        VT100_printf("Error 1\n\r");
    }

    oReturnCheck = Fapi_setActiveFlashBank(Fapi_FlashBank0);

    if(oReturnCheck != Fapi_Status_Success)
    {
        VT100_printf("Error 2\n\r");
    }

    oReturnCheck = Fapi_issueAsyncCommandWithAddress(Fapi_EraseSector,(uint32 *)Bzero_Sector12_start);

    while (Fapi_checkFsmForReady() != Fapi_Status_FsmReady){}

    oReturnCheck = Fapi_doBlankCheck ((uint32_t *)Bzero_Sector12_start, Sector8KB_u32length, &oFlashStatusWord);
    if(oReturnCheck != Fapi_Status_Success)
    {
        VT100_printf("Error 3\n\r");
    }

}

This function return error 3. So there is a blank check error. But no error in the erase part.

So why Can't I program the flash as the part I want to flash is in the same zone as my program?  This code works fine when the device is unlocked.

Thanks!