JavaScript runtime error: 'CKEDITOR' is undefined when called from subdirectory

The javascript error is “CKEDITOR is undefined” indicating the script is not loaded (but only when calling from subdirectoy)

Here is the folder structure I want to use:

Controls/usercontrol.ascx (this control loads ckcontrol.ascx)

Controls/ckcontrol.ascx

subdirectory/PageLoadingUserControl.aspx (this loads usercontrol.ascx)

Here is the code to register script. It is in ckcontrol.ascx This works if I move PageLoadingUserControl.aspx up to root level, but not in a subdirectory. Doesn’t make sense to me. What am I missing?

Protected Overrides Sub OnInit(e As EventArgs)
    'see if ckeditor has already been included in the client script
    If Not Page.ClientScript.IsClientScriptIncludeRegistered("ckeditor.js") Then
        Page.ClientScript.RegisterClientScriptInclude("ckeditor.js", "~/packages/ckeditor_4.4.0_full/CKEditor/ckeditor.js")
    End If
    MyBase.OnInit(e)
    Dim sScript As String = "CKEDITOR.replace( '" & TextBox1.ClientID & "' );"
    ToolkitScriptManager.RegisterStartupScript(Me, Me.GetType(), "CKeditorAdd", sScript, True)

 End Sub