JAVA_HOME

• right click "My Computer" -> properties

• In the window, you should have an "advanced" tab, go to it, then click "environment variables"

• In system varibles, click new, and create a new one as follows (if it's not allready there):

Name: JAVA_HOME

value : C:/Program Files/Java?/jdk1.5.0_04 or where ever you installed your JDK

Ok your way out of the menus.