javac does not work

my cmd prompt does not recognize javac as a internal or external command I am using a fairly new dell with windows xp and sdk version 1.5 anyone else run into this. Any help would be helpful.
[198 byte] By [jjdahlheimera] at [2007-10-1 15:04:47]
# 1
Check the installation instructions Step #5. Also, here is an online tutorial if you need it http://java.sun.com/j2se/1.4.2/install-windows.html http://java.sun.com/docs/books/tutorial/getStarted/cupojava/win32.html
atmguya at 2007-7-10 19:03:24 > top of Java-index,Developer Tools,Java Compiler...
# 2

Ensure that the environment JAVA_HOME points to your JDK 1.5 installation directory's root. Ensure that the environment variables PATH includes the same path/bin.

Example: installed into c:\jdk1.5

JAVA_HOME=c:\jdk1.5

PATH=c:\jdk1.5\bin

(Note: do not remove the other elements in your PATH variable, or Windows may have trouble finding other applications. Separate path elements with a semi-colon).

- Saish

Saisha at 2007-7-10 19:03:24 > top of Java-index,Developer Tools,Java Compiler...