[rules-users] process order example not working fully

I am trying to execute a ruleflow and use rules to assign tasks within the ruleflow in Drools 5.0.1. I have a drl file included in my knowledge base that tries to assign a task to a user when a new human task is created. This is based on the example in org.drools.example.process.order. I can't get my code to work. I don't the rules in the example are working either (dslr for the task assignment or the drl for dynamic logging). After some attempts, I found that this condition WorkItemNodeInstance() does not evaluate to true ever. Do I have to do anything special to make the WorkItemNodeInstance appear in working memory? Thanks for any help. --Aziz