Hi I just downloaded the trail version of cute editor

<%@ Register TagPrefix="CE" Namespace="CuteEditor" Assembly="CuteEditor" %>
<CE:Editor id="Editor1" runat="server" />

Editor display and working properly on my browser no problems.
but it just can't pass the VS compile, keep saying
Error    1    Element 'Editor' is not a known element. This can occur if there is a compilation error in the Web site.    W:\dev\cs\Default2.aspx    15    9    W:\dev\

as well as ,
Error    3    Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.    W:\dev\cs\Default2.aspx    15   

Wondering if anyone had the same problem

Thanks in advance.