SSRS Webservice - Conversion Error on Method CreateSubscription - Powershell

Question

I am migrating subscriptions. I have two reporting servers. I am calling GetSubscriptionProperties on the source server and populating variables to pass into the method 'CreateSubscription' from the destination server. I am getting an error when I try to
pass in the variables from the GetSubscriptionProperties output into the CreateSubscription: 
"Cannot convert the 
"Microsoft.PowerShell.Commands.NewWebserviceProxy.AutogeneratedTypes.WebServiceProxy1tserver_reportservice2005_asmx.ExtensionSettings" value of type 
"Microsoft.PowerShell.Commands.NewWebserviceProxy.AutogeneratedTypes.WebServiceProxy1tserver_reportservice2005_asmx.ExtensionSettings" to type 
"Microsoft.PowerShell.Commands.NewWebserviceProxy.AutogeneratedTypes.WebServiceProxy3tserver_reportservice2005_asmx.ExtensionSettings"."
I had to remove the -namespace from my proxy definition and define the types manually for the source objects to work with GetSubscriptionProperites, but am not sure what to do for the CreateSubscription issue.
-----------------------------CODE BELOW-----------------------
$ReportName = "Report"
#SET SOURCE WEBSERVICE CONNECTION
$ReportServerUriSource = "http://source/reportserver/reportservice2005.asmx";
$global:ssrs = New-WebServiceProxy -Uri $ReportServerUriSource -UseDefaultCredential;
$type = $ssrs.GetType().Namespace
#SET DESTINATION WEBSERVICE CONNECTION
$ReportServerUri = "http://destination/reportserver/reportservice2005.asmx";
$global:Proxy = New-WebServiceProxy -Uri $ReportServerUri -UseDefaultCredential
$type2 = $proxy.GetType().Namespace
#Define Object Types for Subscription property call
$ExtensionSettingsDataType = ($type + '.ExtensionSettings')
$ActiveStateDataType = ($type + '.ActiveState')
$ParmValueDataType = ($type + '.ParameterValue')
$ExtensionSettingsObj = New-Object ($ExtensionSettingsDataType)
$ActiveStateObj = New-Object ($ActiveStateDataType)
$ParmValueObj = New-Object ($ParmValueDataType)
$Description = $null
$Status = $null
$EventType = $null
$MatchData = $null
$Reports = ($ssrs.ListChildren("/", $true) | WHERE-OBJECT {$_.Type -eq "Report"});
$ReportsD = ($proxy.ListChildren("/", $true) | WHERE-OBJECT {$_.Type -eq "Report"});
FOREACH ($Report IN $Reports | WHERE-OBJECT {$_.Name -eq $ReportName})
$Subscriptions = $ssrs.ListSubscriptions($Report.Path, $Report.Owner) | WHERE-OBJECT {$_.LastExecuted -gt [datetime]::parse("01/01/2014")}
$DestinationPath = ($ReportsD | WHERE-OBJECT {$_.Name -eq $ReportName}).Path
FOREACH ($Sub IN $Subscriptions)
IF($Sub.IsDataDriven.ToString() -eq "False")
#GET SUBSCRIPTION PROPERTIES FROM SOURCE
$SubscriptionProperties = $SSRS.GetSubscriptionProperties($Sub.SubscriptionID.ToString(),` [ref]$ExtensionSettingsObj, ` [ref]$description, ` [ref]$ActiveStateObj, ` [ref]$status, ` [ref]$eventType, ` [ref]$matchdata, ` [ref]$ParmValueObj)
#CREATE SUBSCRIPTION IN DESTINATION
$proxy.CreateSubscription($DestinationPath, $ExtensionSettingsObj, $description, $eventType, $matchdata, $ParmValueObj)
ELSE

Answer 1

You would have to declare a new object using the destination type...  I quickly threw something together.  Not sure if it would work... see below.  Part of me wonders if you need to go through all the work anyway.  The method is calling
for values, not an object, per se.  Had you tried passing in the values of the object in question (e.g., $ParmValueObj.Value ... or ... $ExtensionSettingsObj.Value)?
###### Connect to web services
$ssrsProxy = New-WebServiceProxy -Uri $webServiceUrl -UseDefaultCredential
$ssrsProxyDest = New-WebServiceProxy -Uri $webServiceUrl2 -UseDefaultCredential
#Get Subscriptions
$items = $ssrsProxy.ListSubscriptions($folderDestination)
#Get the namespace type of destination web service
$type = $ssrsProxyDest.GetType().Namespace
#Create data types based on the proxy we connect to
$SubESType = ($type + '.ExtensionSettings')
#Create Property object
$SubExtensionSettings = New-Object ($SubESType)
$SubExtensionSettings.Extension = "ParameterValues"
foreach($item in $items){
#Declare some variables
[ref]$ExtensionSettings = $null
[ref]$Description = $null
[ref]$Active = $null
[ref]$Status = $null
[ref]$EventType = $null
[ref]$MatchData = $null
[ref]$Parameters = $null
#Get some subscription properties
$results = $ssrsProxy.GetSubscriptionProperties($item.SubscriptionID,$ExtensionSettings,$Description,$Active,$Status,$EventType,$MatchData,$Parameters)
#Copy from one object to another...
$SubExtensionSettings = $ExtensionSettings
Write-Host " ----- This is the original data ---------"
$ExtensionSettings.Value
Write-Host " ----- This is the copied data ---------"
$SubExtensionSettings.Value