If the chat window is refreshing constantly, you should look and see if you have a line in your website root web.config :
If you find one, then go to c:\Inepub\wwwroot\SightMax\AgentInterface and open in Notepad web.config
You need to add a new line, immediately after </system.web>
Save web.config. Your chat window should not refresh now.
This case was based on a website running AspDotNetStorefront.