inToribash 3.93 none of the old toribash versions work in multiplayer
like 3.93 and below
and all those server where killed?
i just wanna know why?
why did change?
between them?

umm bumb

The server wasn't killed. The server is the same. The server client has changed following the change of the version so its better, stable, etc.
But the 3.93 less version don't have the forward compatibility.
You can read it here :http://en.m.wikipedia.org/wiki/Forward_compatibility

Uh, try this.