CCS/TMS320C6657: have some problem in use interrupt controller

CSL_IntcParam param;
CSL_Status status;
CSL_IntcContext context;
CSL_IntcEventHandlerRecord evt_record[5];

context.numEvtEntries = 5;
context.eventhandlerRecord = evt_record;

// initial Intc
status = CSL_intcInit(&context);
if (status != CSL_SOK)
	printf("CSL Interrupt initial error! code: %d\n", status);

// 
CSL_intcGlobalNmiEnable();
CSL_intcGlobalEnable(NULL);

// set timer2 event to cpu interrupt vector 4
param = CSL_INTC_VECTID_4;
CSL_intcOpen(&timer2_intc, CSL_GEM_TINT2L, &param, &status);
if (status != CSL_SOK)
	printf("Interrupt timer2 open error! code: %d\n", status);

// set event handler
evtrecord.arg = NULL;
evtrecord.handler  = (CSL_IntcEventHandler)&timer2_isr;
status = CSL_intcPlugEventHandler(&timer2_intc, &evtrecord);
if (status != CSL_SOK)
	printf("Interrupt timer2 hook to int function error! code: %d\n", status);

// enable event interrupt
CSL_intcHwControl(&timer2_intc, CSL_INTC_CMD_EVTENABLE, NULL);