Taymindis
     
     
       Below is Not working
       
       SubscribeToEvent(
       
        mainRigidBody
       
       , E_PHYSICSBEGINCONTACT2D, URHO3D_HANDLER(Urho2DConstraints, HandleBallContactStart));
      
       But this is working:
       
       SubscribeToEvent(
       
        mainPhysicslWorld
       
       , E_PHYSICSBEGINCONTACT2D, URHO3D_HANDLER(Urho2DConstraints, HandleBallContactStart));