Failed to call the "InstallApplication" method when using the Application Catalog web service

When I debug to run the code as below, there is no errors or exception occurred. But the software that I choose isn't installed successfully on the target computer.

public ActionResult Index()
        {
            string url = "http://MyServer/CMApplicationCatalog/ApplicationViewService.asmx";
            BasicHttpBinding binding = new BasicHttpBinding();
            binding.Security.Mode = BasicHttpSecurityMode.TransportCredentialOnly;
            binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Windows;
            ApplicationViewServiceSoapClient client = new ApplicationViewServiceSoapClient(binding, new EndpointAddress(url));

            int total = 0;
            AppDetailView[] apps = client.GetApplications(
                ApplicationProperty.Name,
                null,
                ApplicationProperty.Name,
                "",
                20,
                0,
                true,
                ApplicationClassicDisplayName.PackageProgramName,
                false,
                null,
                out total);
            ViewBag.appLength = apps.Length;

            // New connection
            ConnectionOptions ops = new ConnectionOptions();

            ops.Username = "TestUser01";
            ops.Password = "12345678";
            ops.Authority = "DOMAIN:sccm.cn";
            ops.EnablePrivileges = true;
            string userIp = HttpContext.Request.UserHostAddress;
            string address = userIp;
			// New remote connection with client
            ManagementScope scope = new ManagementScope(@"\\" + address + @"\root\ccm\ClientSdk", ops);

            // call WMI
            ManagementClass cls = new ManagementClass(scope.Path.Path, "CCM_SoftwareCatalogUtilities", null);
            cls.Scope.Options = scope.Options;
            // Get DeviceId
            ManagementBaseObject outSiteParams = cls.InvokeMethod("GetDeviceId", null, null);

            // Display current site code.  
            string clientId = outSiteParams["ClientId"].ToString();
            string signedClientId = outSiteParams["SignedClientId"].ToString();

			// Invoke InstallApplication Method
            InstallationInformation retInfo = client.InstallApplication(apps[0].ApplicationId, clientId + "," + signedClientId, null);
            ViewBag.installationInfo = retInfo.BodySignature;

            return View();
        }

The applicationID and deviceID have already got from previous method and SDK, and the reserved has been set into null.

Is there any process needed which is ignored by me?

I am new to the SCCM development, this question confuse me a lot.

Thanks a lot for your ideas!