elesaurus

Hi I can't evaluate probabilistic network if there is utility or decision node in it. I get error "unbbayes.prs.id.UtilityNode cannot be cast to unbbayes.prs.bn.ProbabilisticNode". If I change Condition in evaluation window and run the evaluation, it just freezes after pushing start button. Is this how it supposed to work? Probably just somethin I don't understand. Help please.