AdvancedDetails thumbnail doesn't appear

            var iu = new ImageUploaderWriter("ImageUploader1", 600, 400);

            //For ActiveX control full path to CAB file (including file name) should be specified.
            iu.activeXControlCodeBase = "./inc/ImageUploader4.cab";
            iu.activeXClassId = "44A6A9CA-AC5B-4C39-8FE6-17E7D06903A9";
            iu.activeXControlVersion = "4.1.38.0";

            //For Java applet only path to directory with JAR files should be specified (without file name).
            iu.javaAppletCodeBase = "./inc";
            iu.javaAppletCached = true;
            iu.javaAppletVersion = "2.1.55.0";
            iu.javaAppletClassName="com.autotrader.imageuploader.ImageUploader.class";
            iu.javaAppletJarFileName="ImageUploader.jar"

            iu.showNonemptyResponse = "off";

            //Configure appearance.
            iu.addParam("PaneLayout", "OnePane");
            iu.addParam("UploadView", "AdvancedDetails");
            iu.addParam("ListColumnFileNameText", "File");
            iu.addParam("ListColumnFileTypeText", "");
            iu.addParam("ListColumnLastModifiedText", "");
            iu.addParam("AdvancedDetailsPreviewThumbnailSize", "40");
            iu.addParam("ShowButtons", "false");
            iu.addParam("DropFilesHereText", "\n\nStep 1: Click ''Browse for Photos'' or drag and drop photos here from any folder on your computer. \n\n (Hold ''Ctrl'' key down to multi-select photos.) \n\n Step 2: Click ''Start Upload.''");
            iu.addParam("SilentMode", "true");

            //Configure thumbnail settings.
            iu.addParam("UploadSourceFile", "true");
            iu.addParam("UploadThumbnail1FitMode", "Off");

            //Configure miscellaneous settings.
            iu.addParam("ShowDebugWindow", "false");
            iu.addParam("ShowContextMenu", "false")
            iu.addParam("MaxFileCount", "#{mediaBean.numberOfImagesAllowedToUpload}");
            iu.addParam("FileMask", "*.jpg;*.gif;*.zip");

            //Configure messages
            iu.addParam("MessageMaxFileCountExceededText", "#{mediaBean.maxFileCountExceededMessage}");
            iu.addParam("MessageNoResponseFromServerText", "#{copy.uploadErrorMsg}");
            iu.addParam("MessageServerNotFoundText", "#{copy.uploadErrorMsg}");
            iu.addParam("MessageUnexpectedErrorText", "#{copy.uploadErrorMsg}");

            //Configure URL files are uploaded to.
            iu.addParam("Action", "${context}/upload");
            iu.addParam("RedirectUrl", "upload-complete.jsf");

            //License Keys
            iu.addParam("LicenseKey", "#{mediaBean.licenseKeys}");

            //Tell Image Uploader writer object to generate all necessary HTML code to embed
            //Image Uploader to the page.
            iu.writeHtml();