Vista - Win XP WMI WSH, SetInterfaceMetric not working

Guys,

Here's a snippet of code I am trying to run at Logoff of the user:

' Make sure the IP address is set to automatic and that the
Interface metric is set to automatic.
' Get the collection of configurations to the NIC card with the
MAC address of strMACaddress

colConfigs = objWMIService.ExecQuery _
("Select * From Win32_NetworkAdapterConfiguration where
((IPEnabled=TRUE) and (MACaddress = '" & strMACaddress & "'))")

' Let DHCP automatically assign the IP address and set the
interface metric back to automatic
For Each objConfig In colConfigs
objConfig.EnableDHCP()
intResult = objConfig.SetIPConnectionMetric(200) ' 0
means automatic?
Next

The NIC card is already enabled with TCP/IP protocols. The EnableDHCP
method definitely works. However, the SetIPConnectionMetric method only sets
the metric to the value of 1 no matter what value I use at the parameter.
What's wrong with it? I also want to set it back to automatic metric. What
value do I use for that, maybe zero? I tried that, and it still results with
a value of 1.

Second issue... Vista users are lucky in that they can use the Enable and
Disable methods as well as the NetEnabled property in the
Win32_NetworkAdapter class. Sadly, they are unavailable to Win XP users.
What is the script work around for XP users? At least for the NetEnabled
property, I can use NetConnectionStatus<>0 to show an enabled status.

Thanks in advance for any help here.

... Jim ..