TimeSynchronizer [compilation error ]

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Hi all,

i am getting compilation error while using TimeSynchronizer.

i saw similar question , but it didnt solve.

thank you.

error: ‘TimeSynchronizer’ does not name a type
In constructor ‘Detectchange::Detectchange()’:
error: ‘timesync’ was not declared in this scope
error: expected type-specifier before ‘TimeSynchronizer’
error: expected ‘;’ before ‘TimeSynchronizer’

here is my code snippet.

class myclass
{
public:            
//some stuff            
private:
message_filters::Subscriber<sensor_msgs::LaserScan>* laser_scan_sub;
message_filters::Subscriber<geometry_msgs::PoseStamped>* pose_sub;
TimeSynchronizer<sensor_msgs::LaserScanConstPtr, geometry_msgs::PoseStampedConstPtr> *timesync;
 }

 myclass::myclass()
 {                
 laser_scan_sub  = new message_filters::Subscriber<sensor_msgs::LaserScan>(nh_, "/ms_front_laser", 1);
 pose_sub          = new message_filters::Subscriber<geometry_msgs::PoseStamped>(nh_, "/pose", 1);
 timesync = new TimeSynchronizer<sensor_msgs::LaserScanConstPtr, geometry_msgs::PoseStampedConstPtr>                         (laser_scan_sub, pose_sub, 50);
  timesync->registerCallback(boost::bind(&myclass::laserReceived, this, _1, _2));
 }

 void myclass::laserReceived(const sensor_msgs::LaserScanConstPtr& laser_scan, const geometry_msgs::PoseStampedConstPtr& estimate_pose)
            {
            // some stuff
            }

    int main(int argc, char** argv)
    {
      ros::init(argc, argv, "myclass");
      ros::NodeHandle nh;

      myclass mc;

      ros::spin();          
      return(0);
    }