Error uploading a image file

Hello, 

I´m having a problem with ckfinder 2.4.2 uploading a image. When I upload a image of 6 MB the ckfinder shows me this error "[object XMLHttpRequestProgressEvent]" and don´t upload de image, however, with smaller images I don´t get this error. I´m having the same error with files. 

This is my configuration in config.ascx:      

 LicenseName = "";
        LicenseKey = "";
        BaseUrl = Config.UrlCkFinder + System.Convert.ToString(Session["Seccion"]) + "/";
        BaseDir = Config.PathCkFinder + System.Convert.ToString(Session["Seccion"]) + "/";
        Plugins = new string[] {
            // "CKFinder.Plugins.FileEditor, CKFinder_FileEditor",
            // "CKFinder.Plugins.ImageResize, CKFinder_ImageResize",
            // "CKFinder.Plugins.Watermark, CKFinder_Watermark"
        };
        PluginSettings = new Hashtable();
        PluginSettings.Add("ImageResize_smallThumb", "90x90" );
        PluginSettings.Add("ImageResize_mediumThumb", "120x120" );
        PluginSettings.Add("ImageResize_largeThumb", "180x180" );
        PluginSettings.Add("Watermark_source", "logo.gif" );
        PluginSettings.Add("Watermark_marginRight", "5" );
        PluginSettings.Add("Watermark_marginBottom", "5" );
        PluginSettings.Add("Watermark_quality", "90" );
        PluginSettings.Add("Watermark_transparency", "80" );
        Thumbnails.Url = Config.UrlCkFinderThumbs + System.Convert.ToString(Session["Seccion"]) + "/";
        if ( BaseDir != "" ) {
            Thumbnails.Dir = Config.PathCkFinderThumbs + System.Convert.ToString(Session["Seccion"]) + "/"; 
        }
        Thumbnails.Enabled = true;
        Thumbnails.DirectAccess = false;
        Thumbnails.MaxWidth = 100;
        Thumbnails.MaxHeight = 100;
        Thumbnails.Quality = 80;
        Images.MaxWidth = 1600;
        Images.MaxHeight = 1200;
        Images.Quality = 80;
        CheckSizeAfterScaling = true;
        DisallowUnsafeCharacters = true;
        CheckDoubleExtension = true;
        ForceSingleExtension = true;
        HtmlExtensions = new string[] { "html", "htm", "xml", "js" };
        HideFolders = new string[] { ".*", "CVS" };
        HideFiles = new string[] { ".*" };
        SecureImageUploads = true;
        RoleSessionVar = "CKFinder_UserRole";
        AccessControl acl = AccessControl.Add();
        acl.Role = "*";
        acl.ResourceType = "*";
        acl.Folder = "/";

        acl.FolderView = true;
        acl.FolderCreate = true;
        acl.FolderRename = true;
        acl.FolderDelete = true;

        acl.FileView = true;
        acl.FileUpload = true;
        acl.FileRename = true;
        acl.FileDelete = true;

        DefaultResourceTypes = "";

        ResourceType type;

        type = ResourceType.Add(System.Convert.ToString(Session["Seccion"]));
        type.Url = BaseUrl == "" ? "" : BaseUrl;
        type.Dir = BaseDir == "" ? "" : BaseDir;
        type.MaxSize = 0;
        type.AllowedExtensions = new string[] { "bmp", "gif", "jpeg", "jpg", "png", "tif", "tiff", "pdf" };
        type.DeniedExtensions = new string[] { };

Can anyone help me?

Thanks for your time and sorry about my English.