Hi monicapinto,
You need to replace the "CuteSoft_Client" folder too. Then try the example page below
<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Register TagPrefix="CE" Namespace="CuteEditor" Assembly="CuteEditor" %>
<html>
<body>
<form id="Form1" runat="server">
<CE:Editor ID="editor1" runat="server">
</CE:Editor>
</form>
</body>
</html>
Regards,
Ken