Run Script to change a password...

Help Pleaseeeeee!!!
Hi,
I made a script to change (or reset) the passwords of the domains users.
When I run the script using my domain admin account the script run
correctly, but when I use a user with only change password and reset password
permission the script donâ??t work, I receive a message "general deny access".
I use the delegate wizard in active directory to give access to manage users
password.

This is my script:
_____
strDomain = "domain.com"
strAccount = InputBox("User: ","Reset Password", "")

Set objUser = GetObject("WinNT://" & strDomain & "/" & strAccount & ",user")
objUser.SetPassword "newPassword"
Set objUser = Nothing
______

Thanks in advance, Walter.