Connection problems with WinNT/95

[Türck, Clemens]

On Linux SUSE 6.0 I have installed Samba to put some gigabytes of files from
Linux onto a WindowsNT workstation.
Both computers are in the network of our company, i.e. the same domain
(class C net, Token Ring, Olicom PCI 16/4 Adapters).

I've managed to connect to the Samba server with WindowsNT but the
connection is very slow and unstable (breaks down frequently as I can see in
"/var/log/log.smb"), biggest problems seem to be when listing directory
contents.

I have the similar problems when trying to retrieve the files via ftp
(proftp, port 21), with WindowsNT/95.

Someone told me special ports have to be set for NT-Linux connectivity, does
that help, and how do I do that?
Or could the problem be completely different?

I have added the global section of my smb.conf, but I think it's not a
problem of Samba
(it looks a little messy as I've edited it often, trying to get the right
configuration...)

[global]
   workgroup = multimedia
   guest account = nobody
   keep alive = 30
;   os level = 2
   security = user
   printing = bsd
   printcap name = /etc/printcap
   load printers = no
   encrypt passwords = yes
   os level = 0
   domain master = no
   local master =  no
   preferred master = no
;   socket options = IPTOS_LOWDELAY TCP_NODELAY
;   max log size = 1000
;   read prediction = True
;   read raw = no
;   write raw = no
;   getwd cache = yes
;   oplocks = True
;   deadtime = 15
   interfaces = 150.1.41.200/255.255.255.0
   wins support = no
   wins server = 150.1.2.11

thanks for your help,
Clemens