Multitasking doesn't work under linux?

["Nazgul" <darkelf@aim.homelinux.com>]

Hi, I have a program in Ada, it's a server that listens for connections on a
specified port, and when a connection is estabilished, it creates a new task
to attend that conneciont.

Something like

procedure serverd
  .....
  dummy= new Election;
  Election.Start(socketClient);
  Put_Line("Connection accepted");
 ...

end serverd;

"Start" is and entry point for "Election". The problem is:

Under windows XP, I build the server, launch it, and then launch the client
to connect. The server runs the task to attend the client, and outputs
"Connection accepted", while the Election task is running.

Under Linux, I build the server, launch it, and when I connect the client,
the task executes, but the procedure serverd stays blocked until the
Election task has ended up, and then outputs "Connecion accepted". I mean,
the tasks don't run concurrently under linux, but they do under Windows XP.

I can't find what I'm doing wrong, could you help me?

Thanks

========
A. Iradier