Problem about get content with ASP.NET (.NET Framework 3.5)

I'm using VS 2008 (sp1) (of course it runs on .NET Framework 3.5)

I downloaded FCKEditor.NET 2.6.3 and FCKEditor 2.6.3 (and FCKEditor 2.6.4.1)

I tried add .dll file to bin folder of solution and put fckeditor at root folder (I've tested with both of 2.6.3 and 2.6.4).
Result that I can drag and drog a FCKEditor control to my .aspx page. It displayed well on IE 7 and FIrefox 3.5 .

  <FCKeditorV2:FCKeditor ID="FCKeditor1" runat="server" BasePath="~/fckeditor/">
            </FCKeditorV2:FCKeditor>

I selected data from DB to FCKEditor, then coded Update event to load new data to a label ( FCKEditor had data inside...)

  protected void btnUpdate_Click(object sender, EventArgs e)
        {
          
            lblContent.Text = FCKeditor1.Value; 
}

Although i edited data in Editor by any way, it still only load same old data (that was selected before...) to Label.
WHat's wrong ?

Second, I tried test with no data inside FCKEditor, I added new some texts. THen fire click event, oahhh!!! It's work! :shock:

I searched many articles, forums, tips, tutorials but can't find any solution for my problem...
I hope someone will help me...

Thanks a lot!