help with an exception when trying to establish a socket connection

[nextwave]

i am trying to make a chat (using an applet for the client).......
it uses an simple socket connection between the server and clients.....when i connect the client to address 127.0.0.1 or localhost everything works fine, but when i try to connect the client to my DNS name or ip, i get an exception....the exception reads:

java.security.AccessControlException: access denied (java.net.SocketPermission nextwave.dyndns.org resolve)

at java.security.AccessControlContext.checkPermission(AccessControlContext.java:270)

at java.security.AccessController.checkPermission(AccessController.java:401)

at java.lang.SecurityManager.checkPermission(SecurityManager.java:542)

at java.lang.SecurityManager.checkConnect(SecurityManager.java:1042)

at java.net.InetAddress.getAllByName0(InetAddress.java:937)

at java.net.InetAddress.getAllByName0(InetAddress.java:918)

at java.net.InetAddress.getAllByName(InetAddress.java:912)

at java.net.InetAddress.getByName(InetAddress.java:832)

at java.net.InetSocketAddress.<init>(InetSocketAddress.java:109)

at java.net.Socket.<init>(Socket.java:119)

at Client.<init>(Client.java:42)

at ClientApplet.init(ClientApplet.java:12)

at sun.applet.AppletPanel.run(AppletPanel.java:347)

at java.lang.Thread.run(Thread.java:536)

wat is this all about??????
i'm not that fluent in java or networking at that, but i'm sure there is something i can do to fix this......
any help would be greatley appreciated.

[MasterOfSouls]

I think the problem would be that you have a firewall, if so, then try to change the settings to allow connections on the port you are using for the chat program. If that failes, try disabling the firewall completely to make sure that it works. If you don't have a firewall, then i'm not sure what the problem is. Hope this helps.

- Master Of Souls

[nextwave]

thank you for your reply.......
i do have a firewall (software) as well as a linksux router....
however i checked with someone on the sun forum, and they explained what the problem was (my applet isn't signed).....i have decided, being so much hastles to sign the applet, that i will be using an executable .jar file to be placed on the client's machine......
once again i thank you for your advice.