I have no idea what your config is on either side (zaurus/win) but the more specific you are with smbmount the better. For my win98 box, this works for me:
smbmount //host_name/sharename /zaurus/mountname -o username=username,password=password,ip=ip
where host_name is the name of the win98 box, sharename is the name of the share on the win98 box, mountname is a existing directory on the zaurus, username is a valid user on the win98 box, password is the pw of the user and ip is the ip of the win98 box. hth.
Robert