Skinite javu 7.xy, ovdje http://java.com/en/download/manual_java7.jsp

pod control panelom (start -> control panel) nadite javu (upisete u search bar "java"), te ce vam se otvorit "java control panel" i onda pod tabom "security", tamo gdje pise "exceptions site list" dodajte sljedece adrese, jednu po jednu, neovisno o redoslijedu:

http://chat.net.hr/chat.jsp
http://cgs.net.hr/chatp
http://chat.net.hr
http://chat.net.hr/chat
http://cgs.net.hr/chatp/bcclient.jar

To je to,konacno radi