ofxbox2d ofxkinect

I want attach to my kinect depth point box2d circles. I have such code in draw

  
	if(kinect.getDistanceAt(x, y) > 0 && kinect.getDistanceAt(x, y) < 1000) {  
				mesh.addVertex(kinect.getWorldCoordinateAt(x, y));  
                 my_cirk.destroy();  
                  
                ofPoint q = kinect.getWorldCoordinateAt(x, y);  
                  
                    my_cirk.setPhysics(3.0, 0.53, 0.1);  
                
                    my_cirk.setup(box2d.getWorld(),q.x,q.y,30);  
                  
                 
                rectse.push_back(my_cirk);  
                for(int i=0; i<rectse.size(); i++) {  
                rectse[i].draw();  
                }  
  

in update i have rectse.clear();
program draw all circles but only last have physics. If i haw 20 circles all 19 will be only draw, without physics. If i remove my_cirk.destroy(); or type it in update. The physics objects will draw without limits, not with my depth point