I am currently testing the chat system upon install using sql 2005 express edition, .net 2 (I also tried 1).  I received the following error in both cases

Line 69: 		if(CuteSoft.Chat.ChatWebUtility.CurrentIdentityIsAdministrator)
Line 70: 			temp += "<a Class=\"Big\" href='CuteSoft_Client/CuteChat/Admin'>Chat Admin</a>";