XP - Leopard Network File Sharing

Hello,

I followed these instructions for setting up file sharing between an XP box and a 10.5.6 Mac:

http://macs.about.com/od/macwindows/ss/sharemacfilesxp.htm

I went with the SMB user account sharing option.

I see "Macintosh" in my XP's network window yet when I click on it I get this:



(In XP I'm logged into an admin account.)

?

Thanks.