Don,
Cute Editor Version 6.3 also support ASP.NET 1.1. You don't need to find .NET 3.5 host to use the latest version.
>>I still can't imagine why it works for me and not them.
Have you asked them try my suggestion 3?
Can you ask them get the full version of their browser?
Maybe you are using IE 8.0, but they are using IE 8.0 beta 1.
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