Error while updating a custom Windows Azure Diagnostics configuration xml from powershell. "Invalid update to extension reference for role"

I am attempting to upload a manually edited WADConfig xml to my VM. The WAD service is functioning correctly, I needed to add some custom WinEventLogs. The prescribed steps result in an error.

What am I overlooking?

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I am following these instructions:

Step 5: Remotely install Diagnostics on your Azure Virtual Machine

azure.microsoft.com/en-in/documentation/articles/cloud-services-dotnet-diagnostics/#virtual-machine

$storage_name ="wadexamplevm"
$key ="<StorageAccountKey>"
$config_path="c:\users\<user>\documents\visual studio 2013\Projects\WadExampleVM\WadExampleVM\WadExample.xml"
$service_name="wadexamplevm"
$vm_name="WadExample"
$storageContext =New-AzureStorageContext-StorageAccountName $storage_name -StorageAccountKey $key
$VM1 =Get-AzureVM-ServiceName $service_name -Name $vm_name
$VM2 =Set-AzureVMDiagnosticsExtension-DiagnosticsConfigurationPath $config_path-Version"1.*"-VM $VM1 -StorageContext $storageContext
$VM3 =Update-AzureVM-ServiceName $service_name -Name $vm_name-VM $VM2.VM

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Unfortunately, I am receiving this error:

What's missing from the above script?