Basic browsing problem

[Praise]

Hi all

I have a basic problem in my very little LAN. I simply cant browse from 
Windows. They are all Win98 SE machines and they do not reconize my samba 
server (which is a PDC and it is working nicely, and it is also a wins, and 
Wins.dat looks ok) as master browser. I see from the logs that that PC IS the 
master browser. 

There is a way to statically say to a Win98 machine who is the master browser?
There is a way to disable a Win98 to try to get a master browser? This might 
be not useful, as my Samba Server level is 64 but I want to try....

My logs are not saying anything not interesting, so I wont post them here. 
Now I am increasing the logging level so I will control again.

Moreover, I can browse from Linux (with LinNeighbourhood). 
My LAN has got only 4 PC, and no subnets.

Praise