unable to start tomcat 4.1.21

[Udaya Bascar]

hi
i am using a win 98 machine
i got error like this when clicking startup
or catalina in tomcat bin folder
The catalina_Home environment variable is not defined correctly
This environment variable is needed to run the
program
my autoexec.bat includes
set JAVA_HOME=C:\j2sdk1.4.0_02;
set CATALINA_HOME=C:\jakarta-tomcat-4.1.12;
set path=C:\j2sdk1.4.0_02\bin;C:\jakarta-tomcat-4.1.12\bin;
set classpath=C:\j2sdk1.4.0_02\lib\dt.jar

what i have to give in catalina.bat in tomcat bin folder
plz hlp me out
rgds
bascar