Help:about write data to Flash-Ecc

MCU:TMS570LS20216 with pf035a_api_eabi_vfp.lib;
I want to write Ecc code to Flash-Ecc of Address:0x480000

Code below:

#inclide "F035.h"
void flash_test(void)
{
	U8 i;
	U32 dwRetSt1 = 0;
	U32 dwRetSt2 = 0;
	U32 dwRetSt3 = 0;
	U32 dwRetSt4 = 0;

	U32 FlashDataTemp[10];

	for (i = 0; i < 10; i++)
	{
		FlashDataTemp[i] = i + 0xa5;
	}

	dwRetSt1 = Flash_Compact_B( (UINT32 *)0x100000, 2, 0, 100,(FLASH_ARRAY_ST)FLASHWREG, &status );

	dwRetSt2 = Flash_Erase_Sector_B( (UINT32 *)0x100000, 0x1000, 2, 0, 100,(FLASH_ARRAY_ST)FLASHWREG );

	dwRetSt3 = Flash_Prog_Data_B( (UINT32 *)0x100000, (UINT32 *)&FlashDataTemp[0], 10, 2, 100,
				(FLASH_ARRAY_ST)FLASHWREG, &status, 10, CMND_PROG_DATA_MAIN );


	dwRetSt4 = Flash_Prog_Data_B( (UINT32 *)0x480000, (UINT32 *)&FlashDataTemp[0], 4, 2, 100,
				(FLASH_ARRAY_ST)FLASHWREG, &status, 10, CMND_PROG_DATA_MAIN );

}


Result：

dwRetSt1  = 1；//right
dwRetSt2  = 1；//right
dwRetSt3  = 1；//right  Data Program right
dwRetSt4  = 0；//fault  Then status: 0x00480004;0x00A500A5;0x00000001;0x00000001

Have any Registers to enable writing data to Flash-Ecc???

Sorry for poor english and nasty code!hope for your applying as soon as possible,thank you!!