Netscape & Sun JDK1.3 JRE Plugin Problem

I am not able to run Java Console from Netscape 4.7 on Linux Mandrake 7.2, after installing Sun JDK 1.3. Sun gives the following instructions to install JRE plugin, included in JDK 1.3, for Netscape : --

Unable to run SUn Java JDK v 1.3.0 on Linux

I downloaded Sun JDK Standard Edition v 1.3.0 for Linux and executed the shell script sh ./j2sdk-1_3_0-forte_ce-1_0_2-linux.sh. It extracted all the files but after going into the /usr/local/jdk1.3/bin directory, when I gave the command 'java', it did not execute. On giving ls -l command in the