Trying Glib::signal_io().connect() with GIOChannel (from gnet)

[tc6 <tc6 free fr>]

Here is what I'm trying to do (without success):

ioChannel_.set(gnet_udp_socket_get_io_channel(socket_));  
Glib::signal_io().connect(sigc::ptr_fun(aareceive), ioChannel_, 
Glib::IO_IN | Glib::IO_HUP);

where bool aareceive(Glib::IOCondition c) is my callback function
and ioChannel_ is an object of tIoChannel class:

class tIoChannel:public Glib::IOChannel
{
public:
 tIoChannel(){}
 virtual ~tIoChannel(){}
 void set(GIOChannel *c){gobject_ = c;}  //ouch, never gone work....I 
know but I'm desperate
};

gcc returns the following (and obvious) error:

error: no matching function for call to `Glib::SignalIO:: 
connect(sigc::pointer_functor1<Glib::IOCondition, bool>, tIoChannel&,
  Glib::IOCondition)'

Is there a more appropriate method to do such a thing. I know that it is 
preferable to use the function Glib::IOChannel::create(...) but all I 
have is an udp_channel from gnet library or its GIOChannel  by using the 
function gnet_udp_socket_get_io_channel(socket_).
I really need help. How can I create a Glib::IOChannel with an IOChannel 
gtk (and not gtkmm!!!)

Thank you