[rules-users] classnotfound\classdefnotfound

Hello: I have the drools5 embedded in an ear. When running aginst JBoss 5 gets the following classnotfound exception but it works okay with websphere and pramati application server. Wondering if someone could throw some pointers. Please note that drools-compiler, drools-core etc are all in the ear and added to the manifest. Thanks, cabear java.lang.NoClassDefFoundError: org/drools/base/extractors/BaseObjectClassFieldReader at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:621) at org.drools.base.ClassFieldAccessorCache$ByteArrayClassLoader.defineClass(ClassFieldAccessorCache.java:367) at org.drools.base.ClassFieldAccessorFactory.getClassFieldReader(ClassFieldAccessorFactory.java:135) at org.drools.base.ClassFieldAccessorCache$CacheEntry.getReadAccessor(ClassFieldAccessorCache.java:315) at org.drools.base.ClassFieldAccessorCache.getReadAcessor(ClassFieldAccessorCache.java:245) at org.drools.base.ClassFieldAccessorStore.wire(ClassFieldAccessorStore.java:379) at org.drools.base.ClassFieldAccessorStore.getReader(ClassFieldAccessorStore.java:97) at org.drools.base.ClassFieldAccessorStore.getReader(ClassFieldAccessorStore.java:74) at org.drools.rule.builder.PatternBuilder.getFieldReadAccessor(PatternBuilder.java:1031) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:560) at org.drools.rule.builder.PatternBuilder.buildConstraint(PatternBuilder.java:235) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:196) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:104) at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:69) at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:68) at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1159) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:649) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:290) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:488)