It could be a license issue.
If you have an official license file, Please find the license file we sent to you upon purchase, and upload it to your server. If you are unable to find the license file, email us and specify the email address used for purchasing in your response.
If you are evaluating the version 4.0, please use the following temp license 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