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characteritic read authorize reply what is the err

			case BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST:
			{	
				ble_gatts_evt_rw_authorize_request_t  *p_authorize_request;
				p_authorize_request = &p_ble_evt->evt.gatts_evt.params.authorize_request;
				
				if(p_authorize_request->type == BLE_GATTS_AUTHORIZE_TYPE_READ)
				{
					ble_gatts_rw_authorize_reply_params_t authorize_reply_para;
					
					authorize_reply_para.type = BLE_GATTS_AUTHORIZE_TYPE_READ;
					switch(p_authorize_request->request.read.context.char_uuid.uuid)
					{	
						case 0xfff3:
						{
							uint8_t reply[5];
							uint32_t ret;

							if (triggerHistoryDataCursor == triggerHistoryDataSize) {
								
								memset(reply,0,sizeof(reply));
							}
							else {
								uint32_t time = triggerEventData[triggerHistoryDataCursor].timestamp;
								reply[0] = triggerEventData[triggerHistoryDataCursor].trig;
								reply[1] = BREAK_UINT32(time, 3);
								reply[2] = BREAK_UINT32(time, 2);
								reply[3] = BREAK_UINT32(time, 1);
								reply[4] = BREAK_UINT32(time, 0);
								incrtriggerHistoryDataCursor();
							}
							
							authorize_reply_para.params.read.gatt_status = BLE_GATT_STATUS_SUCCESS;
							authorize_reply_para.params.read.update = 1;
							authorize_reply_para.params.read.p_data = reply;
							authorize_reply_para.params.read.len = TRIGGER_EVENT_DATA_LEN;
							ret = sd_ble_gatts_rw_authorize_reply(p_jawbone->conn_handle, &authorize_reply_para);
							printf("ret = %d\n", ret);
							break;
						}	

the ret vaule always 7,,what this the err in my code?