Java - Netscape security

INTERFACE INGENIERIE INFORMATIQUE (interii@cadrus.fr)
Tue, 09 Sep 1997 17:12:21 +0200

Date: Tue, 09 Sep 1997 17:12:21 +0200
From: INTERFACE INGENIERIE INFORMATIQUE <interii@cadrus.fr>
To: java-security@web2.javasoft.com
Subject: Java - Netscape security

Hello

When I execute your exemple :
(http://java.sun.com/security/signExample/) via APPLETVIEWER it work
correctly. But when I use Netscape 4.01, the certificate is not
recognized ? Why ?