I try modify source code, like this ...
[ToolboxItem(true)]
[ToolboxBitmapAttribute(typeof(FCKEditor), "Gizmox.WebGUI.FCKLibrary.FCKEditor.bmp")]
[DesignTimeController("Gizmox.WebGUI.Forms.Design.PlaceHolderController, Gizmox.WebGUI.Forms.Design, Version=3.0.5701.0, Culture=neutral, PublicKeyToken=dd2a1fd4d120c769")]
ClientController("Gizmox.WebGUI.Client.Controllers.PlaceHolderController, Gizmox.WebGUI.Client, Version=3.0.5701.0, Culture=neutral, PublicKeyToken=0fb8f99bd6cd7e23")]
MetadataTag("Gizmox.WebGUI.FCKLibrary.FCKEditor")]
public partial class FCKEditor : Control ...
... and ...
public FCKEditor()//this.TagName = "Gizmox.WebGUI.FCKLibrary.FCKEditor";
{
but FCKEditor never displayed. No errors, no exceptions, no "page not found".
Please help ....