java.lang.OutOfMemoryError: Java heap space errors

var iu = new ImageUploaderWriter("ImageUploader1", 930, 400);

//For Java applet only path to directory with JAR files should be specified (without file name).
iu.javaAppletJarFileName = "ImageUploader5.jar";
iu.javaAppletCodeBase = "/_inc/uploader/";
iu.javaAppletCached = true;
iu.javaAppletVersion = "5.1.10.0";

iu.showNonemptyResponse = "off";

//Configure License Keys
iu.addParam("LicenseKey", "72050-10000-C6DFB-9B203-6E509");

//Configure appearance and behaviour.
iu.addParam("PaneLayout", "ThreePanes");
iu.addParam("FolderView", "List");
iu.addParam("UploadView", "List");
iu.addParam("ShowDebugWindow", "true");
iu.addParam("ShowDescriptions", "false");
iu.addParam("BackgroundColor", "#ffffff");

iu.addParam("FilesPerOnePackageCount", "100");

//Configure Image Uploader to rotate photos automatically
//according to the orientation stored in EXIF metadata.
iu.addParam("AllowAutoRotate", "true");

//Append the form with total file size to the upload.
iu.addParam("AdditionalFormName", "Form1");

//Configure file mask to upload JPEG images only.
iu.addParam("FileMask", "*.jpeg;*.jpg;*.jpe");

//Set image size restrictions.
iu.addParam("MinImageWidth", "333");
iu.addParam("MinImageHeight", "333");

//Exclude the source file from upload because only
//resized versions of the photo will be sent.
iu.addParam("UploadSourceFile", "false");

//Configure settings of the optimized image. Optimized image
//is resized to 1200x1200 with JPEG quality = 60 and EXIF
//metadata is preserved.
iu.addParam("UploadThumbnail1FitMode", "Fit");
iu.addParam("UploadThumbnail1Width", "500");
iu.addParam("UploadThumbnail1Height", "500");
iu.addParam("UploadThumbnail1JpegQuality", "80");
iu.addParam("UploadThumbnail1CopyExif", "true");

iu.addParam("UploadThumbnail1Watermark",
    "ImageUrl=http://www.zoomphoto.ca/v4/_img/watermark/101_watermark.png;ImageWidth=86;ImageHeight=63;" + "Position=Center;Opacity=50");

//Configure thumbnail settings.
iu.addParam("UploadThumbnail2FitMode", "Fit");
iu.addParam("UploadThumbnail2Width", "150");
iu.addParam("UploadThumbnail2Height", "150");
iu.addParam("UploadThumbnail2JpegQuality", "60");

iu.addParam("ExtractExif", "ExifDateTime");

//Configure URL files are uploaded to.
iu.addParam("Action", "http://www.zoomphoto.ca/upload_event_images.php");

//Configure URL files are uploaded to.
//iu.addParam("Action", "upload.php");

//Add event handlers.
iu.addEventListener("UploadFileCountChange", "ImageUploader_UploadFileCountChange");
iu.addEventListener("Progress", "ImageUploader_Progress");