lhoward.
1. Did you install your dotnetnuke in a virtual diretory "/DotNetNuke"?
2. Are you sure the provider folder (/DotNetNuke/Providers/) exists in your web server?
3. if 1 and 2 are both true, can you paste your web.config file?
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