Image loading problem

ok, so I am using class files on my server to load my program but it is erroring out at my images

here is my code:

            Lab6 = new JLabel(new ImageIcon(getImage("LoadingGame.png")));
            Lab6.setBounds(0,0,1000,700);
            Mainwindow.add(Lab6);
            Lab6.setVisible(true); 

The image is in the same directory as the class files and I even set the permissions on the images to 777 but still getting this error:

AccessControlException
access denied("java.io.FilePermission""LoadingGame.png""read")

any idea as to what I should be doing??

Thank you