This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
If the server the applet is trying to connect to is not the same as the one where the applet was served from, then that is not allowed by the applet security restrictions. See HowCanAnAppletReadFilesOnTheLocalFileSystem for information regarding the two ways around this.