Problème connection WMI en php après hébergement

$objLocator = new COM("WbemScripting.SWbemLocator");
	$objService = $objLocator->ConnectServer();


	$objWEBM = $objService->Get("Win32_DiskDrive");
//Le reste c'est le traitement, pas de soucis

function GetWMI($ClassWin32)
{	
	$objLocator = new COM("WbemScripting.SWbemLocator");
	$objService = $objLocator->ConnectServer();


	$objWEBM = $objService->Get($ClassWin32);
	$objProp = $objWEBM->properties_;
	$i=0;
	foreach($objProp as $name)
	{
		$arrProp[$i]=$name;
		$i++;
	}

	$objWEBMCol = $objWEBM->Instances_();
	$i=0;
	foreach($objWEBMCol as $name)
	{
		$arrWEBMCol[$i]=$name;
		$i++;
	}

	foreach($arrWEBMCol as $objItem)
	{
		reset($arrProp);
		$arrInstance = array();
		foreach($arrProp as $propItem)
		{
			eval("\$value = \$objItem->" .$propItem->Name .";");
			if(trim($value) != "")
			{
				$arrInstance[$propItem->Name] = trim($value);
			}
		}
		
		foreach($arrInstance as $cle=>$valeur)
		{
			switch($ClassWin32)
			{
				case "Win32_DiskDrive":
					$valeur=GetDiskDriveDetails($cle,$valeur);
					break;
				case "Win32_OperatingSystem":
					$valeur=GetOSDetails($cle,$valeur);
					break;
				default:
					break;
			}
			echo $cle.' : <b>'.$valeur.'</b><br>';
		}	
		echo '<br>';
	}
}