IRIS x Listener x HCL Notes

Please, help!

From the Volt MX application, I need to open a Notes window, and when I close this window, I need to update the Volt app screen, for this I am creating a listener in Volt and as they are from different hosts, when I close the notes window, I I send an ok postMessage to the volt, but it's not working! Can someone help me?
Listener in the onRowClick of a segment (VOLT):
function SegmentAnexos_OnRowSelect(self){
var _url;
if (proposalStatus === "In Fulfillment") {
_url = voltmx.visualizer.getPropertyValue(self.view.SegmentAnexos.selectedRowItems[0]["lblUrl"], "text");
} else {
_url = voltmx.visualizer.getPropertyValue(self.view.SegmentAnexos.selectedRowItems[0]["lblUrl1"], "text");
}
window.addEventListener("message", function(event) {
// Receive the message
console.log("OK");
});
voltmx.application.openURL(_url);
}

postMessage in Notes: