Sharing Files and Printer from Win98

Using a private network, workgroup -- I can share files and printers OK
between XP and Vista PC's. I can access the shared files on Win98 from the
Visa PC, but when I try to access the Vista shared files/printers from
Win98, it asks for a password. I have a user account/password established
on Vista for the Win 98 network login, but it still does not work. Any
suggestions? The Vista load is on a dual boot PC with Vista on
dedicated hard drive. The file sharing works when I boot to XP - The files
I share are on third internal hard drive (separate from the XP and Vista
boot drives)