Hi allinone,
 
What you are using is CuteMessenger, if you only has the CuteChat license there, that  will be a problem. Please confirm that you have file "CuteMessenger.lic" under your "bin" folder.
 
By the way, for the load balancing environment, you may need to set it up as http://cutesoft.net/ASP.NET+Chat/Developer-Guide/scr/Load-Balancing.htm
 
Regards,
 
ken