[rules-users] Error with Helloworld Drools projet

Hello everybody, I want to create my first drools projet with eclipse and I've got this following error. org.drools.RuntimeDroolsException: Unable to load dialect 'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java' ............................. ...................... Caused by: java.lang.RuntimeException: The Eclipse JDT Core jar is not in the classpath ............................ ................. ... 7 more Please cant somebody tell me what's wrong with my program. I've used an eclipse Eclipse Java EE IDE for Web Developers; and drools 4.0.7 Thanks -- View this message in context: http://drools.46999.n3.nabble.com/Error-with-Helloworld-Drools-projet-tp3... Sent from the Drools: User forum mailing list archive at Nabble.com.