When trying to connect through a Socks proxy from an applet the following exception occurs :

java.security.AccessControlException: access denied (java.lang.RuntimePermission writeFileDescriptor)
        at java.security.AccessControlContext.checkPermission(AccessControlContext.java:273)
        at java.security.AccessController.checkPermission(AccessController.java:404)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:545)
        at java.lang.SecurityManager.checkWrite(SecurityManager.java:953)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:204)
        at java.net.SocketOutputStream.<init>(SocketOutputStream.java:44)
        at java.net.PlainSocketImpl.getOutputStream(PlainSocketImpl.java:380)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:306)
        at java.net.Socket.connect(Socket.java:430)
        at java.net.Socket.connect(Socket.java:379)
        at java.net.Socket.<init>(Socket.java:293)
        at java.net.Socket.<init>(Socket.java:121)
        at Applet4.start(Applet4.java:20)
        at sun.applet.AppletPanel.run(AppletPanel.java:358)
        at java.lang.Thread.run(Thread.java:539)