Not able to read images - AccessControlException (my Java program)

[JiiPee]

I am quite new to Java. I have downloaded a tictac example Java code and
I run it on Eclipse with no problems. But when I try to test it outside
Eclipse by doing the following:

I copy the .class file and two gif-images to another location and call
the Java from html code:
<applet code="hello/HelloWorld.class" WIDTH="300" HEIGHT="300">
And I put the two gif-files to hello/images folder,

I get and error:

AccessControlException
access denied ("java.io.FilePermission")
"\I:\Important\Programming\WebProgramming\hello\images\not.gif" "read")

The path seems to be correct. I load the pictures from the Java code by:
notImage = getImage(getCodeBase(), "images/not.gif");

If I draw (drawLine) the X and O instead of using gif, then it works....
so its really the gif-loading which is the problem.

I have Windows XP. I also tried it to run inside XAMPP server folder in
my machine but the same problem.

Does anybody know how could I fix this problem to be able to run it on
my machine?
Thank you.