running default "Hello" Drools Project

In set up eclipse 3.5 as given on "http://www.jboss.org/tools/download" under "JBoss Tools 3.1 :: Eclipse 3.5.0"

Now when I am trying to set up a hello Drools Project I am getting this error

org.drools.RuntimeDroolsException: Unable to load dialect 'org.drools.rule.builder.dialect.java.Java
DialectConfiguration:java:org.drools.rule.builder.dialect.java.JavaDialectConfiguration'
at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:274)

at org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfi
guration.java:259)
at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:176)
at org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:153)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:242)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:142)
at org.drools.builder.impl.KnowledgeBuilderProviderImpl.newKnowledgeBuilder(KnowledgeBuilderProvide
rImpl.java:29)
at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:29)
at com.sample.DroolsTest.readKnowledgeBase(DroolsTest.java:39)
at com.sample.DroolsTest.main(DroolsTest.java:23)
Caused by: java.lang.RuntimeException: The Eclipse JDT Core jar is not in the classpath
at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.setCompiler(JavaDialectConfigurati
on.java:94)
at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.init(JavaDialectConfiguration.java
:55)
at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:270)

... 9 more

I would like to mention that while creating this application I added a DroolsRumtime and set it to C:\drools folder. But no jar was placed in that folder. I manually copied jars there. The jars that I copied are

drools-all-jdk5-2.1.jar
drools-ant-5.0.1.jar
drools-api-5.0.1.jar
drools-bam-5.0.1.jar
drools-clips-5.0.1.jar
drools-compiler-5.0.1.jar
drools-core-5.0.1.jar
drools-decisiontables-5.0.1.jar
drools-jsr94-5.0.1.jar
drools-mc-5.0.1.jar
drools-messenger-jms-5.0.1.jar
drools-persistence-jpa-5.0.1.jar
drools-process-task-5.0.1.jar
drools-templates-5.0.1.jar
drools-transformer-jaxb-5.0.1.jar
drools-transformer-jxls-5.0.1.jar
drools-verifier-5.0.1.jar
drools-workitems-5.0.1.jar

I am unable to make it is
IS installing JBoss Tools 3.0 or 3.1 means we are doing it for Drools4.0 or Drools5.0. And what is the dependency in this regard as such.