>>it is working fine in my local computer, but when I upload it to a webserver it gives the same error
Please create a virtual directory or website pointing it to the 'CutechatStandalone\Web' folder.
If you have access to the IIS, please check this:
If you don't have access to the IIS, pleas check your host control panel or contact your host.
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