Webfolder on Windows 2000

Webfolder on Windows 2000

Hi.

I'm having a problem with "webfolder" feature.
On clients running Windows XP, the webfolder is running great.
But when I try to use webfolder on clients running Windows 2000, I cannot use it. I go to "My Network Places", I click on "Add Network Place" and I give the URL as shown in the wizard window, e.g. http://IP/webfs/files/group_name/user_name , but the response is "the folder is invalid"

What should I do ?

Thanks