When adding a condition to a when rule which enables the Select Values link, it seem that you first need to submit your property selection on the condition modal dialog to have the select values get populated with values. Our customer asks if it is possible to get the values from select values link as soon as they select a property on one side of the equation.
If you look at the implementation of Select Values link, it runs 3 sets of actions on-click event. You could try adding these actions for pzRAFParamType property. Note, however it might cause performance issues even if it is successful.