problem with doubleclick in gnome 2.4

Hei,I am having problems with double-clicking wiht left mouse button (Button2).
I am using the example code that is found in the Motif  programming manual.

I am using RedHat 8.0 and RHEL 3.0, Xfree86 4.2, OpenMotif 2.2 and Gnome 2.0

I compile with the follwoing line.

> gcc mc.c -o mc -L/usr/X11R6/lib -lXm -lX11

What can I configure to make the follwong code recognize the double click.

Best regards
Birgir Sigurjonsson,
Roxar AS, Oslo.

/* multi_click.c -- demonstrate handling multiple PushButton clicks.
** First, obtain the time interval of what constitutes a multiple
** button click from the display and pass this as the client_data
** for the button_click() callback function. In the callback, single
** button clicks set a timer to expire on that interval and call the
** function process_clicks(). Double clicks remove the timer and
** just call process_clicks() directly.

#include <Xm/PushB.h>
XtAppContext app;

main (int argc, char *argv[])
   Widget     toplevel, button;
   void       button_click(Widget, XtPointer, XtPointer);
   XmString   btn_text;
   int        interval;
   Arg        args[2];

   XtSetLanguageProc (NULL, NULL, NULL);
toplevel = XtVaOpenApplication (&app, "Demos", NULL, 0, &argc, argv, NULL,
                                   sessionShellWidgetClass, NULL);

   /* get how long for a double click   */
   interval = XtGetMultiClickTime (XtDisplay (toplevel));
   printf ("Interval = %d\n", interval);

   btn_text = XmStringCreateLocalized ("Push Here");
   XtSetArg (args[0], XmNlabelString, btn_text);
   button = XmCreatePushButton (toplevel, "button", args, 1);
   XtManageChild (button);
   XmStringFree (btn_text);
   XtAddCallback (button, XmNactivateCallback, button_click,
                   (XtPointer) interval);
   XtRealizeWidget (toplevel);
   XtAppMainLoop (app);

/* Process button clicks. Single clicks set a timer, double clicks
** remove the timer, and extended clicks are ignored.
void button_click (Widget w, XtPointer client_data, XtPointer call_data)
   static XtIntervalId    id;
   void                   process_clicks(XtPointer, XtIntervalId *);
   int                    interval = (int) client_data;
   XmPushButtonCallbackStruct *cbs =
                           (XmPushButtonCallbackStruct *) call_data;

   if (cbs->click_count == 1)
       id = XtAppAddTimeOut (app, (unsigned long) interval,
                               process_clicks, (XtPointer) False);
   else if (cbs->click_count == 2) {
       XtRemoveTimeOut (id);
       process_clicks ((XtPointer) True, (XtIntervalId *) 0);

/* This function won't be called until we've established whether
** or not a single or a double click has occurred.
void process_clicks (XtPointer client_data, XtIntervalId *id)
   int double_click = (int) client_data;

   if (double_click)
       puts ("Double click");
       puts ("Single click");

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