Try this link:
[link|http://www.windowsxpuser.com/forums/viewtopic.php?p=13967|http://www.windowsxp...topic.php?p=13967]
If you have XP Home, XP Home just won't use that feature. Which is why you got the error. XP Pro is really the way to go, XP Home is the peon/luser version of XP. I tell people this, but noody ever believes me.
Expert's Exchange has this on it:
[link|http://www.experts-exchange.com/Operating_Systems/WinXP/Q_20733337.html|http://www.experts-e...P/Q_20733337.html]
Also the abuse^H^H^H^H^Husegroup has this to say about it:
[link|http://www.derkeiler.com/Newsgroups/microsoft.public.windowsxp.security_admin/2003-03/3275.html|http://www.derkeiler...2003-03/3275.html]
I hope one of these helps you.