Hi! This is a weired thing. If I set CLASSPATH j2sdk1.4.0_01\lib\tools.jar the execution of test.class (which I successfully compiled from test.java) doesn�t work (The class cannot be found!) If I leave the CLASSPATH empty, it works!!! That is weired. Unfortunately I want to add jdom.jar to my classpath, if I do that the execution of test.class doesn�t work anymore. Another problem/question: Where do I have to put jdom.jar that it can be found? I put it in c:/j2sdk1.4.0_01/lib, but during compilation the packages that shoud be imported cannot be found. Weired, too! Someone can help me?