PC seen in Neighborhood but w/o files- Help

I have a network with 4 computers (Win98). Until now all
saw each other and folders/files were accessable. I
swapped out an old computer for a newer one and now they
can all see each other in Network Neighborhood, but the
the folders/files don't appear when I click on the new
one.

I can access all files on the older PC's from the new one
though! The new one is there, it just looks as though
there is nothing on it.

Any help is appreciated!