Copying from one valuelist to another value list. Just for reference. Use .TestValueList(<current>) not .TestValueList(<current>).pxResults
FYI, from help
For Each Element in a Value List
Select the For Each Element in a Value List option to repeat the step for each element in a Value List property.
Each time the step repeats, the system applies a method or instruction of your choice (such as Property-Set) to the current property. Use the <CURRENT> index value to refer to the current property element.
When you select this iteration form, a Value List Property field appears. Identify the Value Listproperty in the field.