I have to use the FCKeditor but in my web site I have to use the Updatepanel, and whe I want to save, but the FCKEditor don't send me the text for save, any one konw how I can resolve this issue thanks for your time.

I found this at http://forums.asp.net/t/1028530.aspx?... and it works perfectly for me:

A very very simple solution of this problem is - just write the below single line code to your Page_Load(). It'll work for multiple FCK Editor present inside update panel also.

this.Page.ClientScript.RegisterOnSubmitStatement(this.GetType(), "AjaxHack", "for ( var i = 0; i < parent.frames.length; ++i ) if ( parent.frames[i].FCK ) parent.frames[i].FCK.UpdateLinkedField();");