Scripting automatic startup for virtual machines under Microsoft Virtual Server

Hi,

I am trying to develope a PHP script which will automatic startup for virtual machines under Microsoft Virtual Server 2005 r2 but it failed due to COM object saying Source unknown But the same thing when i tried through VB script it works fine.
VB script:

Set objVS = CreateObject("VirtualServer.Application")
Set objVM = objVS.FindVirtualMachine("VM Name")
objVM.RunAsDefinedAccount = True
result = objVM.SetAccountNameAndPassword("DOMAIN\Username","Password")
objVM.AutoStartAtLaunch = 2

It Worked fine
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ___________ _ _ _ _ _
PHP Script:

$objVS = new COM("VirtualServer.Application");
$objVM = $objVS->FindVirtualMachine("Scorpio");
$objVM->Startup();
it throuhgs Error at FindVirtualMachine function saying

ERROR: Fatal error: Uncaught exception 'com_exception' with message 'Source: Unknown


Plese Help me it's urgengt !!

Thanks in advance

 

Lol, sorry, I think I can't help in it...
I'm really noob at PHP >.<