How to solve java.security.AccessControlException

In relation to the past two threads of mine.

• JDBC Connection Problem
• PHP JDBC JApplet

I am getting the java.security.AccessControlException.
This gets more wierder now, I'm just accessing a .txt file inside the server.
(Not anymore the database). But still I'm getting these exception.

Here's the full exception:

Code:

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java.lang.reflect.InvocationTargetException
        at com.sun.deploy.util.DeployAWTUtil.invokeAndWait(Unknown Source)
        at sun.plugin2.applet.Plugin2Manager.runOnEDT(Unknown Source)
        at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
        at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.security.AccessControlException: access denied (java.io.FilePermission maps\map01.txt read)
        at java.security.AccessControlContext.checkPermission(Unknown Source)
        at java.security.AccessController.checkPermission(Unknown Source)
        at java.lang.SecurityManager.checkPermission(Unknown Source)
        at java.lang.SecurityManager.checkRead(Unknown Source)
        at java.io.FileInputStream.<init>(Unknown Source)
        at java.io.FileReader.<init>(Unknown Source)
        at controller.MapController.loadMapInfo(MapController.java:41)
        at controller.MapController.<init>(MapController.java:34)
        at controller.GameController$Board.<init>(GameController.java:46)
        at controller.GameController.<init>(GameController.java:27)
        at controller.MainController.<init>(MainController.java:17)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at java.lang.Class.newInstance0(Unknown Source)
        at java.lang.Class.newInstance(Unknown Source)
        at sun.plugin2.applet.Plugin2Manager$12.run(Unknown Source)
        at java.awt.event.InvocationEvent.dispatch(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)
Exception: java.lang.reflect.InvocationTargetException

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The loadMapInfo() only loads the data from the .txt file to a model class.
And the rest only are connections to the loadMapInfo().

Can anyone help me?
And how?
How am I going to get a permission to omit this excepition? (getPermission()?).