crashing problem

void InitLevel()
{
   
   int size;
 for(unsigned int i = 0; i < Flock.size(); i++)
     {
      delete Flock;
     }
 Flock.clear();
 
 for(unsigned int i = 0; i < Sheep.size(); i++)
     {
      delete Sheep;
     }
 Sheep.clear();
 
 size = vGroups.size();
 for(unsigned int i = 0; i < size; i++)
     {
      delete vGroups;
     }
 vGroups.clear();
 
 size = vEnemys.size();
 for(unsigned int i = 0; i < size; i++)
     {
      delete vEnemys;
     }
 vEnemys.clear();

  for(int i = 0; i < NumberInFlock; i++)
     {
      CVehicle* v = new CVehicle(Vector2D(35 - i*3 - 3,50));
      Flock.push_back(v);
      //delete v;
     }

    
    //double offsetX=-3;       //Box
    //double offsetY= 4.5;
   
    for(unsigned int i = 1; i < NumberInFlock; i++)
     {
      Flock->CreateObstacles();
      Flock->GetMyAgents(Flock);
      Flock->GetWorldAgents(Flock);
      Flock->SetMaxSpeed(5);
      Flock->Steering()->SetBoxWeight(2);
      Flock->SetGroupId(0);
      Flock->GetHeightMap(g_HeightMap);
     }
       
    for(int i = 0; i < NumberOfSheep; i++)
     {
      CVehicle* v = new CVehicle(Vector2D(65 -2*i,80));
      Sheep.push_back(v);
     }
   
    for(unsigned int i = 0; i < NumberOfSheep; i++)
     {
      Sheep->CreateObstacles();
      Sheep->GetMyAgents(Sheep);
      Sheep->GetWorldAgents(Sheep);
      Sheep->SetMaxSpeed(2);
      Sheep->Steering()->SetBoxWeight(2);
      Sheep->GetHeightMap(g_HeightMap);
     }
   ///////////////////////////////  
   //Set Up The Different Groups
   ///////////////////////////////
   
  // Flock[0]->SetLeader(Flock[0]);
   Flock[0]->CreateObstacles(); 
   Flock[0]->GetWorldAgents(Sheep);
   //Leader->Steering()->PursuitOn(Sheep[0]);
   //Flock[0]->Steering()->ArriveOn();
   Flock[0]->SetMaxSpeed(5);
   Flock[0]->Steering()->SetBoxWeight(1.5);
   Flock[0]->GetHeightMap(g_HeightMap);
   //Flock[0]->SetGroupId(0);
  // Flock[0]->MakeLeader();
   //vGroupHasLeader.push_back(true);
   
   CGroup* g = new CGroup();
   vGroups.push_back(g);
   vGroups[0]->PutVehiclesInGroup(Flock);
   vGroups[0]->PutTarget(Vector2D(20,100));
   vGroups[0]->GetEnemies(Sheep);
   
   vector<CVehicle*>  Units;
   
   Units.assign(Sheep.begin(), Sheep.begin() + 6);
   CEnemy* e = new CEnemy(SitAndWait);
   vEnemys.push_back(e);
   vEnemys[0]->PutVehiclesInGroup(Units);
   vEnemys[0]->GetPlayers(Flock);
   vEnemys[0]->GetHome(Vector2D(50, 50) );
   vEnemys[0]->GetTravelFormation(Row);
   vEnemys[0]->GetAttackFormation(Row);
   
   
   Units.assign(Sheep.begin() + 6, Sheep.end());
   CEnemy* e1 = new CEnemy(Guard);
   vEnemys.push_back(e1);
   vEnemys[1]->PutVehiclesInGroup(Units);
   vEnemys[1]->GetPlayers(Flock);
   vEnemys[1]->GetObstacle(&vObstacles[vObstacles.size()-1]);
   vEnemys[1]->GetBuilding(vBuildings[vBuildings.size()-1]);
   //vEnemys[1]->GetHome(Vector2D(50, 50) );
   vEnemys[1]->GetTravelFormation(Row);
   vEnemys[1]->GetAttackFormation(Row);
   
   //vEnemys[0]->GetObstacle(&vObstacles[0]);
   //vEnemys[0]->PutTarget(Vector2D(100,70));
   
   for(unsigned int i = 0; i < NumberInFlock; i++)
     {
      Flock->GetMoreWorldAgents(Sheep);
     }
   for(unsigned int i = 0; i < NumberOfSheep; i++)
     {
      Sheep->GetMoreWorldAgents(Flock);
     }
   Gun.GetEnemies(Sheep);
   Gun.GetPlayers(Flock); 
   Gun.GetBuildings(vBuildings);
   Gun.GetHeightMap(g_HeightMap);
   
 right_up = true;
 Exit = false;
}