Need help with dbus

[dibo20 at wp.pl]

Hi,

I'm not familiar in C/C++ programming. I analyze C examples and 
transform them to Free Pascal. Free Pascal have no dbus-glib bindings 
yet, so I can't use this example:
http://developer.pidgin.im/wiki/DbusHowto#DBUSglibexample
I must use low level API. I found DBUS function 
"dbus_connection_try_register_object_path" for asynchronously listening 
pidgin signals. This works but only on my computer. When I send this 
plugin to my friend, "message_handler" function is never called. I don't 
know what is a reason of this (Free Pascal compiler, DBUS or Pidgin), so 
I'm trying to write this same in pure C to confirm what is the cause. As 
mentioned earlier, I'm not familiar in C and below example is compiling 
but doesn't work. This is modified example of skype DBUS client. Can 
anyone help me?

Regards

#include <iostream>
#define DBUS_API_SUBJECT_TO_CHANGE
#include <dbus/dbus.h>
#include <glib.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <dbus/dbus-glib-lowlevel.h>

DBusConnection *connection;

using namespace std;

static DBusHandlerResult notify_handler( DBusConnection *bus, 
DBusMessage *msg, void *user_data )
   {
   fprintf( stderr, "notify_handler called\n");

   return (DBusHandlerResult) TRUE;
   }

int main()
{
   DBusObjectPathVTable vtable;
   GMainLoop *loop;
   DBusError error;
   fprintf( stderr, "Main func\n" );

   dbus_error_init( &error );
   connection = dbus_bus_get( DBUS_BUS_SESSION, &error );
   if ( connection == NULL )
     {
     fprintf( stderr, "Failed to open connection to bus: %s\n", 
error.message );
     dbus_error_free( &error );
     exit( 1 );
     }

   loop = g_main_loop_new( NULL, FALSE );

   dbus_connection_setup_with_g_main( connection, NULL );    // set up 
te DBus connection

   vtable.message_function = notify_handler;            // register 
handler for incoming data on DBus
   if (dbus_connection_register_object_path( connection, 
"/im/pidgin/purple/PurpleObject", &vtable, 0 )==0)
   {
     fprintf( stderr, "Cant register object path\n");
   }

   g_main_loop_run( loop );                    // the main loop
   return 0;
}