[rules-users] Upgrade 4.0.4 to 4.0.5 failed !?

Dear Drools users, i tried to replace Drools 4.0.4 with 4.0.5 and know i get the following errors: [20.03.08 09:21:24:100 CET] 00000036 SystemOut O 2008-03-20 09:21:24 XXX XXXX ERROR Exception executing predicate org.drools.base.mvel.MVELPredicateExpression@329c329c - org.drools.RuntimeDroolsException: Exception executing predicate org.drools.base.mvel.MVELPredicateExpression@329c329c org.drools.RuntimeDroolsException: Exception executing predicate org.drools.base.mvel.MVELPredicateExpression@329c329c at org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:216) at org.drools.rule.OrConstraint.isAllowed(OrConstraint.java:50) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:318) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145) at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:22) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145) at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:22) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:318) at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153) at org.drools.reteoo.Rete.assertObject(Rete.java:175) at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192) at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:915) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:887) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:688) Caused by: java.lang.ClassCastException: org/drools/rule/AbstractCompositeConstraint$MultiFieldConstraintContextEntry incompatible with org/drools/rule/PredicateConstraint$PredicateContextEntry at org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:209) at org.drools.rule.OrConstraint.isAllowed(OrConstraint.java:50) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:318) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145) at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:22) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145) at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:22) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:318) at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153) at org.drools.reteoo.Rete.assertObject(Rete.java:175) at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192) at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:915) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:887) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:688) What do i have to change? Do i miss sth important? Cheers Markus