Networking win.98SE to Win,2K pro.

I’ve just set up a new pc in my peer to peer network running Win.2K. All pc’s are showing in the network window. The only problem is when I try to access the pc running W2K from a pc running Win98, I’M asked for a password. I didn’t set up any password and I enabled access to everyone on this pc.Any suggestions how I can find this password or gain access to the W2K pc from the rest of the network?