samba - Nov 2007 - findsmb works on mac osx but not linux

What am I missing?

Samba 3.0.23b

using Mandriva  2007 and an Iomega NAS drive on which I can read and write 
files using ftp,  I  can mount it on /mnt/share with the appropriate
smbmount command.

But findsmb shows the form in which the IP ADDRESS and 
NETBIOS NAME should be listed but never finds the drive.
Why not?