resolveNode problem

I am trying to make a button in a repeating subform become visible when clicking a button not on that repeating subform.

I can get this one to work for the first instance

var cNode = xfa.resolveNodes("form1.P1.ItemSet[0].RemoveLineBtn");
cNode.presence = "visible"

But when I try to use the [*], like this, it doesn't work.

var cNode = xfa.resolveNodes("form1.P1.ItemSet[*].RemoveLineBtn");
cNode.presence = "visible"

The message I get is "GeneralError: Operation failed.
XFAObject.resolveNode:1:XFA:form1[0]:P1[0]:DocTop[0]:ShowCreatorBtns[0]:click
SOM expression returned list when single result was expected"

What am I doing wrong and how do I fix it?

Appreciate your help.