Upgraded to PS3, System.Net.WebClient not working on some machines - powershell

Question

I am running in a lab environment and need to automate about 50 machines. I am trying to recover an .xml wireless network profile from a server then install it. This command is being sent from 1 server to the 50 clients.
I recently reimaged my some of my clients and upgraded from PS2 to PS3 and now my Download script is not working anymore.
It does work fine on my PS2 workstations. I am assuming that it might be a permission thing, but I'm not sure. ThrustedHosts is set to * and Script execution policy is set to Unrestricted.
Here's a snippet and the error:
function InstallProfile(){
clear
$fonction =
#'
param($profileName)
$File = "c:\profiles\profile.xml"
$webclient = New-Object System.Net.WebClient
$webclient.Proxy = $NULL
$ftp = "ftp://anonymous:anonymous#192.168.2.200/profiles/$profileName"
$uri = New-Object System.Uri($ftp)
Write-Host (hostname)
$webclient.DownloadFile($uri, $File)
write-host (hostname) (netsh wlan add profile filename="c:\profiles\profile.xml")
'#
$profileName = Read-Host "Enter the profile name(XML file must be present in c:\share\profiles\)"
ExecCmd -fonction $fonction -argument $profileName
func_done
}
#
function ExecCmd
{
param(
$fonction,
$argument
)
$PingTest = RetrieveStatus
$results = #{}
$results = $PingTest.up
$results | sort -uniq | out-Null
$fonctionSB = ConvertTo-ScriptBlock($fonction)
foreach($result in $results)
{
$os = "Windows"
try{
$session = New-PSSession -ComputerName $result.address -Credential $credentials -EA stop
}
catch{
$os = "Not Windows"
}
if($os -eq "Windows"){
Invoke-Command $result.address -ScriptBlock $fonctionSB -Arg $argument -Credential $credentials
Get-PSSession | Remove-PSSession
}
else{
Write-Host $result.address "does not support Powershell commands"
}
}
}
And the error:
Exception calling "DownloadFile" with "2" argument(s): "An exception occurred during a WebClient request."
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : WebException
+ PSComputerName : 192.168.2.110

Answer 1

I found a workaround,
I added a try/catch for the webclient.Download, which works for PS2. In the catch portion, I replaced the command with Invoke-WebRequest $uri -OutFile $File
Works fine for PS2 and PS3 this way!