[rules-dev] jboss 4.05GA and drools 5.1.0M1?

Hi guys, Sorry for posting this problem here again, but I've been searching up and down for solutions and the only solution I found online doesn't work for me. So my problem is when I tried to integrate drools into my application which is using jboss 4.05GA, I got the following error after I added the eclipse JDT core jar to the classpath. java.lang.NoSuchMethodError: org.eclipse.jdt.internal.compiler.CompilationResult.getProblems()[Lorg/eclipse/jdt/core/compiler/IProblem; at org.apache.jasper.compiler.JDTCompiler$2.acceptResult(JDTCompiler.java:345) I tried the solution on http://www.jboss.org/community/wiki/RulesTomcat --> I set -Ddrools.compiler=JANINO in my jboss server startup script, changed my java code to use JANINO dialect, but I am still getting the same error, and if I remove the JDT core jar, I get org.drools.RuntimeDroolsException: Unable to load dialect 'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java:org.dro ols.rule.builder.dialect.java.JavaDialectConfiguration'^M at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:274)^M People's mentioning that the solution worked, so am I missing something here? Thanks a lot!