MOF file Compile Error

I am trying to create a Class to fetch some information from Hardware Inventory Report in Configuration manager. The .mof file is giving compile error. This script is copied from url - http://www.potentengineer.com/inventorying-and-reporting-on-driver-information-with-configmgr/

$NewClassName = 'Win32_PnpSignedDriver_Custom'
$Date = get-date

Remove-WmiObject $NewClassName -ErrorAction SilentlyContinue


$newClass = New-Object System.Management.ManagementClass ("root\cimv2", [String]::Empty, $null)
$newClass["__CLASS"] = $NewClassName


$newClass.Qualifiers.Add("Static", $true)

$newClass.Properties.Add("DeviceClass", [System.Management.CimType]::String, $false)
$newClass.Properties.Add("DeviceName", [System.Management.CimType]::String, $false)
$newClass.Properties.Add("DriverDate", [System.Management.CimType]::DateTime, $false)
$newClass.Properties.Add("DriverProviderName", [System.Management.CimType]::String, $false)
$newClass.Properties.Add("DriverVersion", [System.Management.CimType]::String, $false)
$newClass.Properties.Add("HardwareID", [System.Management.CimType]::String, $false)
$newClass.Properties.Add("DeviceID", [System.Management.CimType]::String, $false)
$newClass.Properties.Add("ScriptLastRan", [System.Management.CimType]::String, $false)
$newClass.Properties["DeviceName"].Qualifiers.Add("Key", $true)
$newClass.Properties["DeviceID"].Qualifiers.Add("Key", $true)
$newClass.Put() | Out-Null

Get-WmiObject win32_pnpsigneddriver -Property DeviceClass, DeviceName,DriverDate,DriverProviderName,DriverVersion,HardwareID,DeviceID | 

where{$_.DeviceClass -ne 'VOLUMESNAPSHOT' -and $_.DeviceClass -ne 'LEGACYDRIVER' -and $_.DriverProviderName -ne 'Microsoft' -and $_.DriverVersion -notlike "2:5*"} | 

ForEach-Object {

  Set-WmiInstance -Namespace root\cimv2 -class $NewClassName -argument @{
    DeviceClass = $_.DeviceClass;
    DeviceName = $_.DeviceName;
    DriverDate = $_.DriverDate;
    DriverProviderName = $_.DriverProviderName;
    DriverVersion = $_.DriverVersion;
    HardwareID = $_.HardwareID;
    DeviceID = $_.DeviceID;
    ScriptLastRan = $Date
} | Out-Null
}

write-output "Complete"