RM44L520: RM44L520 Boot Loader Unable to Erase SECTORS

Hi ,

I am using /rm46_can_boot project to work on RM44L520 .

I have dowloaded the sample project spna199.zip from https://www.tij.co.jp/jp/lit/an/spna199/spna199.pdf?ts=1632322606954&ref_url=https%253A%252F%252Fwww.google.com%252F .and I am using to program the RM44L520 .

While erasing an sector at address 0x0006_0000 the Microntrolloer is struck in bl_flash.c line number 159 .

while( FAPI_CHECK_FSM_READY_BUSY == Fapi_Status_FsmBusy );
while(FAPI_GET_FSM_STATUS != Fapi_Status_Success);

I have previously worked with RM48L952 Boot loader and also trying to compre but I have no luck in erasing an sector on RM44L520 .

Can you suggest what is mising 

Thanks In Advance,