The " Object reference not set to an instance of an object. " error occurs when you try to access something that isn't there (null or
Nothing).

Have you registered the CuteEditor control before using it on the page??

<%@ Register TagPrefix="CE" Namespace="CuteEditor" Assembly="CuteEditor" %>

asp.net Chat http://cutesoft.net/ASP.NET+Chat/default.aspx
Web Messenger: http://cutesoft.net/Web-Messenger/default.aspx
asp.net wysiwyg editor: http://cutesoft.net/ASP.NET+WYSIWYG+Editor/default.aspx
asp wysiwyg html editor: http://cutesoft.net/ASP
asp.net Image Gallery: http://cutesoft.net/ASP.NET+Image+Gallery/default.aspx
Live Support: http://cutesoft.net/live-support/default.aspx