Hello Friends, As I have to create an applet which reads a local file , I have to rely on Trusted Applets. I have created a trusted applet as mentioned in http://www.developer.com/java/data/article.php/3303561. But when Iam loading the applet whose code is given in that url, thru an IE 6.0 its not showing any confirmation window regarding certificate , rather than that its throwing an exception java.lang.NullPointerException: cannot load a window in a container. When I applied the same mechanism to my applet (which reads a file ), java.lang.security exception is thrown. Please suggest me where I got actual problem and why browser is not detecting this trusted applet.I got jdk1.3 and IE 6.0. Plz help me.