Unable to locate the Javac Compiler in:
  C:\Program Files\Java\jre1.6.0_02\..\lib\tools.jar
Please ensure you are using JDK 1.4 or above and
not a JRE (the com.sun.tools.javac.Main class is required).
In most cases you can change the location of your Java
installation by setting the JAVA_HOME environment variable.