Cannot connect with opc-ua on raspberry

var opcua = require("node-opcua");
var w1bus = require("node-w1bus");
var bus = w1bus.create();
var rpiDhtSensor = require("rpi-dht-sensor");

function read_sensor(sensor,callback) {
                bus.getValueFrom(sensor)
                .then(function(res){  callback(null,res.result); })
                .catch(callback);
        };

function start_server() {

          var server = new opcua.OPCUAServer({
                  port: 1234
          });

          server.buildInfo.productName ="Rapsberry OPCUA Server"

          function post_initialize() {

                  var addressSpace = server.engine.addressSpace;
                  var devices = addressSpace.addFolder("ObjectsFolder",{ browseName: "Devices"});
                  var temperatureSensor = "28-041460c2a3ff";
                  install_sensor(temperatureSensor);
          };

          var tempValue = -20.0;
          var tempValue1 = -20.0;
          var humValue = -20.0;

          function install_sensor(sensor) {
                  var addressSpace = server.engine.addressSpace;
                  var sensorName = "ds18b20";
                  var sensorName1 = "dht11";
                  var devices = addressSpace.rootFolder.objects.devices;
                  var sensor  = addressSpace.addObject({
                          organizedBy: devices,
                          browseName:  sensorName
                  });

                  var dht = new rpiDhtSensor.DHT11(27);

                  setInterval(function() {
                          var temperatureSensor = "28-041460c2a3ff";
                          read_sensor(temperatureSensor,function(err,result) {
                                  tempValue = result.value;
                          });
                          var readout = dht.read();
                          tempValue1 = readout.temperature.toFixed(2);
                          humValue = readout.humidity.toFixed(2);
                  },3000);

                  addressSpace.addVariable({
                          propertyOf: sensor,
                          browseName: "temperature1",
                          dataType:   "Double",
                          value: {
                                  get: function () {
                                          return new opcua.Variant({dataType: opcua.DataType.Double, value: tempValue });
                                  }
                          }
                  });

                  addressSpace.addVariable({
                          propertyOf: sensor,
                          browseName: "temperature2",
                          dataType:   "Double",
                          value: {
                                  get: function () {
                                          return new opcua.Variant({dataType: opcua.DataType.Double, value: tempValue1 });
                                  }
                          }
                  });

                  addressSpace.addVariable({
                          propertyOf: sensor,
                          browseName: "humidity",
                          dataType: "Double",
                          value: {
                                  get: function() {
                                          return new opcua.Variant({dataType: opcua.DataType.Double, value: humValue });
                                  }
                          }
                  });
          };

          server.initialize(post_initialize);

          server.start(function() {
                  console.log("\n\nTemperature - OPCUAServer");
                  var endpointUrl = server.endpoints[0].endpointDescriptions()[0].endpointUrl;
                  console.log("Server endpoint url is ", endpointUrl );
                  console.log("\n");
          });
  }

start_server();

This is my server on raspberry. I have w10..and i want just to get the values from those sensors..temperature and humdity.. but when I try to connect, i get this

>> uaClient = opcua('opc.tcp://192.168.1.107:1234');
Error using opc.ua.Client (line 302)
Server URL must start with 'opc.tcp://hostname:port'.

Error in opcua (line 32)
uaObj = opc.ua.Client(varargin{:});

[Ruica Cristina]

Any help???