[gtkmm] Glib::signal_io

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I'm having some problems with the Glib::signal_io().connect() function to do 
the reading from a serial port.

The code:

/* ***********
serie.hh
*********** */

#ifndef _SERIE_HH
#define _SERIE_HH

#include "config.h"
#include <iostream>

#include <stdio.h>
#include <sys/shm.h>
#include <glib-2.0/glib.h>
#include <unistd.h>

#include <gtkmm.h>

class serie
{
public:

 serie();

 bool callback_funcion(Glib::IOCondition);

 int fd;

protected:

private:
 SigC::Connection conexion;
};
#endif

/* ***********
serie.cc
********** */

serie::serie()
{

 // We put de descriptor of the serial port into fd

 // Make the polling of the port with the callback_funcion
 this->conexion = 
Glib::signal_io().connect(SigC::slot(*this,&serie::callback_funcion),
					     this->fd,
					     Glib::IO_IN);
}

bool serie::callback_funcion(Glib::IOCondition con)
{
 // It doesn't work so does nothing :-(
}



When I try to compile I get this error message :


g++ -DHAVE_CONFIG_H -I. -I. -I..     -g -O2 -DORBIT2=1 -pthread 
-I/usr/include/libgnomeuimm-2.0 -I/usr/lib/libgnomeuimm-2.0/include 
-I/usr/include/libgnomemm-2.0 -I/usr/lib/libgnomemm-2.0/include 
-I/usr/include/libgnomecanvasmm-2.0 -I/usr/lib/libgnomecanvasmm-2.0/include 
-I/usr/include/gconfmm-2.0 -I/usr/lib/gconfmm-2.0/include 
-I/usr/include/libglademm-2.0 -I/usr/lib/libglademm-2.0/include 
-I/usr/include/libbonobouimm-2.0 -I/usr/lib/libbonobouimm-2.0/include 
-I/usr/include/libgnomeui-2.0 -I/usr/include/gtkmm-2.0 
-I/usr/lib/gtkmm-2.0/include -I/usr/include/libgnome-2.0 
-I/usr/include/gtk-2.0 -I/usr/lib/sigc++-1.2/include 
-I/usr/include/sigc++-1.2 -I/usr/include/glib-2.0 
-I/usr/lib/glib-2.0/include -I/usr/lib/gtk-2.0/include 
-I/usr/include/pango-1.0 -I/usr/include/Xft2 -I/usr/include/freetype2 
-I/usr/X11R6/include -I/usr/include/atk-1.0 -I/usr/include/orbit-2.0 
-I/usr/include/libbonobo-2.0 -I/usr/include/gconf/2 
-I/usr/include/gnome-vfs-2.0 -I/usr/lib/gnome-vfs-2.0/include 
-I/usr/include/linc-1.0 -I/usr/include/bonobo-activation-2.0 
-I/usr/include/libxml2 -I/usr/include/libgnomecanvas-2.0 
-I/usr/include/libart-2.0 -I/usr/include/libglade-2.0 
-I/usr/include/libbonobomm-2.0 -I/usr/lib/libbonobomm-2.0/include 
-I/usr/include/libbonoboui-2.0 -I/usr/include/orbitcpp-2.0 
-I/usr/local/include/mysql -c -o serie.o `test -f 'serie.cc' || echo 
'./'`serie.cc

In the file included of /usr/include/sigc++-1.2/sigc++/object_slot.h:98:
/usr/include/sigc++-1.2/sigc++/object_slot.h: In the constructor
  `SigC::ObjectSlotNode::ObjectSlotNode(void (*)(void*), T*, void*, T2) 
[with
  T = serie, T2 = bool (serie::*)(Glib::IOCondition)]':
/usr/include/sigc++-1.2/sigc++/slot.h:255:   instanced from `SigC::Slot1<R, 
P1>::Slot1(SigC::SlotNode*) [with R = bool, P1 = Glib::IOCondition]'
/usr/include/sigc++-1.2/sigc++/object_slot.h:98:   instanced from 
`SigC::Slot1<R, P1> SigC::slot(O1&, R (O2::*)(P1)) [with R = bool, P1 = 
Glib::IOCondition, O1 = serie, O2 = serie]'
serie.cc:102:   instanced from
/usr/include/sigc++-1.2/sigc++/object_slot.h:35: no se encuentra una función
  coincidente para la llamada a `SigC::ObjectSlotNode::init(serie*&, 
void*&,
  void (SigC::Object::*&)())'
/usr/include/sigc++-1.2/sigc++/object_slot.h:36: candidates are: void
  SigC::ObjectSlotNode::init(SigC::Object*, void*, void 
(SigC::Object::*)())
make: *** [serie.o] Error 1

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