Help with map driver

Hi!

I'm developing a gridslam driver for player and i'm stuck with the map
interface messages. when i try to use the MapProxy on my client I get a
segmentation fault i'm following gridmap driver as an example. I'm using
robot-player 2.0.4 and stage 2.0.3 from ubuntu repositories.
What i'm i doing wrong?  Please help, my deadline is aproching...

Thanks in advance

here is my ProcessMessage() (just the map part)

	 // Is it a request for the map info?
  if(Message::MatchMessage(hdr, PLAYER_MSGTYPE_REQ,
                            PLAYER_MAP_REQ_GET_INFO,
                            this->prov_map_ID) )
  {
    
     map_info.scale=0.3;//map.GetResolution();
    map_info.width=40;//map.Getxmax()-map.Getxmin();
    map_info.height=40;//map.Getymax()-map.Getymin();
    map_info.origin=init_pose;
    
    this->Publish(this->prov_map_ID,
                 resp_queue,
                 PLAYER_MSGTYPE_RESP_ACK,
                 PLAYER_MAP_DATA_INFO,
                 (void*)&map_info,
                 sizeof(player_map_info_t),
		  NULL);
    return(0);
  } 
 // Is it a request for the map data?
  if(Message::MatchMessage(hdr, PLAYER_MSGTYPE_REQ,
                            PLAYER_MAP_REQ_GET_DATA,
                            this->prov_map_ID) )
  {
    
    map_data.col=0;
    map_data.row=0;
    map_data.width=map.GetSizeX();
    map_data.height=map.GetSizeY();
    
    int si=map_data.width;
    int sj=map_data.height;
    
    for(int j = 0; j < sj; j++)
    {
      for(int i = 0; i < si; i++)
      {
	float p=0;//map.GetProbValue(i,j);
	if (p<=0.001)
	  p=-1;
	else{
	  if (p<0.99)
	   p=0; 
	  else
	   p=1;
	}
	map_data.data[i+j*si]=p;
      }
    }
    
    
    
    
    this->Publish(this->prov_map_ID,
                 resp_queue,
                 PLAYER_MSGTYPE_RESP_ACK,
                 PLAYER_MAP_REQ_GET_DATA,
                 (void*)&map_data,
                 sizeof(player_map_data_t));
             
    puts("Map data sent!");
    return(0); 
  }




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