Problem with the function sdl_numjoysticks

The function sdl_numjoysticks does not return me always the same value (at init time). I explain.

I have two computers : one with DEBIAN6.0 (where I want to use my joysticks but it’s not my compute) and one with windows (where I work usually). I am connecting to the DEBIAN computer with MobaXterm (XDMCP session).

I made a little test program to print the number of joysticks.

#include <stdlib.h>
#include <stdio.h>
#include <SDL/SDL.h>
#include <SDL/SDL_joystick.h>

int NbJS,NJS;
void main() {
if (SDL_InitSubSystem(SDL_INIT_JOYSTICK) < 0)
fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
fprintf(stderr, "%i joysticks were found.\n\n", NbJS );

fprintf(stderr, "Joystick %d :%s\n",NJS,SDL_JoystickName(NJS));

When I was connecting to the DEBIAN computer, it is OK and the function SDL_NumJoysticks() find two Joysticks :

2 joysticks were found.
Joystick 0 :Mad Catz Pro Flight Cessna Rudder Pedals
Joystick 1 :Madcatz Saitek Pro Flight X-55 Rhino Stick

When I was connecting directly in the DEBIAN computer, I do not have the same result :

1 joysticks were found.
Joystick 0 :Madcatz Saitek Pro Flight X-55 Rhino Stick

If I remove this stick, the DEBIAN computer finds correctly Mad Catz Pro Flight Cessna Rudder Pedals.

I used SDL 1.2.14. I can not explain that. If anybody has an explaination … If I upgrade SDL, does it resolve the problem ? I am not sure to be allowed to do this update.