How can i create a custom button in a new toolbar and still have the mouse over select event. ?

 

This i my .config file :
...
 <toolbars>
  <item type="g_start" />
  <item type="holder" name="insertcustombutonhere" />
  <item type="g_end" />
 </toolbars>
...

I use the following code to add the button:

Dim tc As CuteEditor.ToolControl
tc = ED.ToolControls("insertcustombutonhere")
If Not tc Is Nothing Then
 Dim Image1 As New System.Web.UI.WebControls.Image()
 Image1.ToolTip = ""
 Image1.ImageUrl = ImageURL & "textbox.gif"
 Image1.CssClass = "CuteEditorButton"
 Image1.Attributes("onclick") = "CuteEditor_GetEditor(this).ExecCommand('PasteHTML',false,'hello')"
 tc.Control.Controls.Add(Image1)
End If

But when i hold the mouse over the button the icon does not get the orange background.

Regards
Bo