noguan,
In version 3.1, we disable the online toolbar for embed messenger. I think you can enable it by modifying the xml UI file. But I suggest you just upgrade to verdsion 4.0. We improved a lot in version 4.0. I will post the code and show you how to enable it later.
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