Better read the following which may answer ur question.
How can an applet open a network connection to a computer on the internet?
Applets are not allowed to open network connections to any computer, except for the host that provided the .class files. This is either the host where the html page came from, or the host specified in the codebase parameter in the applet tag, with codebase taking precendence.
For example, if you try to do this from an applet that did not originate from the machine foo.com, it will fail with a security exception:
Socket s = new Socket("foo.com", 25, true);
How can an applet open a network connection to its originating host?
Be sure to name the originating host exactly as it was specified when the applet was loaded into the browser.
That is, if you load an HTML page using the URL http://foo.state.edu/~me/appletPage.html
then your applet will be able to connect to its host only by using the name foo.state.edu. Using the IP address for foo.state.edu won't work, and using a "shorthand" form of the host name, like foo.state instead of foo.state.edu, won't work.