Microsoft VBScript runtime error: Permission denied: 'GetObject'

Hi,
I am trying to run the following program in a Windows 2000 machine.I am getting the error as " Microsoft VBScript runtime error: Permission denied: 'GetObject'".Please suggest me something.
Option Explicit
Dim refWMIService
Dim objComputer
Dim colComputer
'get a reference to the SWbemServices object
set refWMIService = GetObject("winMgmts:\\ipaddress")
Set colComputer = refWMIService.ExecQuery _
("Select * from Win32_ComputerSystem")

For Each objComputer in colComputer
Wscript.Echo objComputer.UserName
Next

The purpose of the above program is to output the logged on user for the computer being queried.

maybe this could help a bit : http://support.microsoft.com/kb/251361

http://forums.techarena.in/tags/index.php/vbscript/

Thanks for the reply.I tried whatever mentioned in the link..But it didn't work..:no: