从机CC2640使能notify问题

我使用主机CC2541发送使能notify消息给从机CC2640，但是在从机CC2640上没办法进入这个部分

      case GATT_CLIENT_CHAR_CFG_UUID:
   
        status = GATTServApp_ProcessCCCWriteReq( connHandle, pAttr, pValue, len,
                                                 offset, GATT_CLIENT_CFG_NOTIFY );

我用手机试验过CC2640能正常的接收和处理使能notify消息

以下是我的CC2541查找及连接的部分

查找服务：GATT_DiscPrimaryServiceByUUID( simpleBLEConnHandle, uuid, ATT_BT_UUID_SIZE, simpleBLETaskId );

获取句柄

static void simpleBLEGATTDiscoveryEvent( gattMsgEvent_t *pMsg )
{
	
          
	if( simpleBLEDiscState == BLE_DISC_STATE_SVC )
	{
		// Service found, store handles
		if(( pMsg->method == ATT_FIND_BY_TYPE_VALUE_RSP) && (pMsg->msg.findByTypeValueRsp.numInfo > 0))
		{simpleBLESvcStartHdl = pMsg->msg.findByTypeValueRsp.handlesInfo[0].handle;simpleBLESvcEndHdl = pMsg->msg.findByTypeValueRsp.handlesInfo[0].grpEndHandle;
		}
    
		// If procedure complete
		if(( pMsg->method == ATT_FIND_BY_TYPE_VALUE_RSP && pMsg->hdr.status == bleProcedureComplete )||( pMsg->method == ATT_ERROR_RSP ) )
		{
//			if ( simpleBLESvcStartHdl != 0 ){	simpleBLEDiscState = BLE_DISC_STATE_CHAR;

                              GATT_DiscAllChars(simpleBLEConnHandle,simpleBLESvcStartHdl,simpleBLESvcEndHdl,simpleBLETaskId);
                                }
		}
	}
	else if( simpleBLEDiscState == BLE_DISC_STATE_CHAR )
	{

		// Characteristic found, store handle
		if ( pMsg->method == ATT_READ_BY_TYPE_RSP && pMsg->msg.readByTypeRsp.numPairs > 0 )
		{

                        
                  
                         //find all
                        simpleBLECharHdl[0] = BUILD_UINT16( pMsg->msg.readByTypeRsp.dataList[3],pMsg->msg.readByTypeRsp.dataList[4]);
                        simpleBLECharHdl[1] = BUILD_UINT16( pMsg->msg.readByTypeRsp.dataList[10],pMsg->msg.readByTypeRsp.dataList[11]);
                        
                        CentralConfig();
                        osal_set_event( simpleBLETaskId, CEN_DATA_SEND_EVT );
                        HalUARTWrite( 0, pMsg->msg.readByTypeRsp.dataList,ATT_MTU_SIZE-2);
                        
    
                        
		}
                else
                {
                        osal_start_timerEx( simpleBLETaskId, CEN_START_DISCOVERY_EVT, DEFAULT_SVC_DISCOVERY_DELAY );
                
                }
                  simpleBLEDiscState = BLE_DISC_STATE_IDLE;
        }

其中simpleBLECharHdl[1]为从机2640通道2的句柄（对应notify通道）

CentralConfig（）为发送notify使能消息

static uint8 CentralConfig(void)
{
attWriteReq_t writeReq;
uint8 state;

writeReq.len = 2;
writeReq.value[0] = LO_UINT16(GATT_CLIENT_CFG_NOTIFY);
writeReq.value[1] = HI_UINT16(GATT_CLIENT_CFG_NOTIFY);
writeReq.sig = 0;
writeReq.cmd = 0;
writeReq.handle = simpleBLECharHdl[1];
state = GATT_WriteCharValue(simpleBLEConnHandle, &writeReq, simpleBLETaskId);
return(state);
}

麻烦TI的大神们帮我看看哪里有问题，为什么无法使能CC2640的notify功能？谢谢