in an attempt to create a 3d enviroment in directx, I used this code

 Terrain* WallLeft = new Terrain("WallFBX", m_d3dDevice.Get(), m_fxFactory, Vector3(-50.0f, 0.0f, 0.0f), 0.0f, 300.00f, 0.0f, 0.25f * Vector3::One);
 m_GameObjects.push_back(WallLeft);
 m_ColliderObjects.push_back(WallLeft);
 m_TriggerLose.push_back(WallLeft);

 Terrain* WallRight = new Terrain("WallFBX", m_d3dDevice.Get(), m_fxFactory, Vector3(100.0f, 0.0f, 0.0f), 0.0f, 300.0f, 0.0f, 0.25f * Vector3::One);
 m_GameObjects.push_back(WallRight);
 m_ColliderObjects.push_back(WallRight);
 m_TriggerLose.push_back(WallRight);

 Terrain* WallCube1 = new Terrain("WallCubeFBX", m_d3dDevice.Get(), m_fxFactory, Vector3(50.0f, 0.0f, 101.0f), 0.0f, 300.0f, 0.0f, 0.25f * Vector3::One);
 m_GameObjects.push_back(WallCube1);
 m_ColliderObjects.push_back(WallCube1);
 m_TriggerLose.push_back(WallCube1);

 Terrain* WallCube2 = new Terrain("WallCubeFBX", m_d3dDevice.Get(), m_fxFactory, Vector3(52.0f, 0.0f, -99.0f), 0.0f, 300.0f, 0.0f, 0.25f * Vector3::One);
 m_GameObjects.push_back(WallCube2);
 m_ColliderObjects.push_back(WallCube2);
 m_TriggerLose.push_back(WallCube2);

 Terrain* WallCube3 = new Terrain("WallCubeFBX", m_d3dDevice.Get(), m_fxFactory, Vector3(0.0f, 0.0f, 0.0f), 0.0f, 300.0f, 0.0f, 0.25f * Vector3::One);
 m_GameObjects.push_back(WallCube3);
 m_ColliderObjects.push_back(WallCube3);
 m_TriggerLose.push_back(WallCube3);

 Terrain* WinSpace = new Terrain("table", m_d3dDevice.Get(), m_fxFactory, Vector3(0.0f, 0.0f, -150.0f), 0.0f, 300.0f, 0.0f, 0.25f * Vector3::One);
 m_GameObjects.push_back(WinSpace);
 m_ColliderObjects.push_back(WinSpace);
 m_TriggerWin.push_back(WinSpace);

however, having more than one m_ColliderObject causes an assertion fail with the breakpoint being here in the vector class

#if _CONTAINER_DEBUG_LEVEL > 0
        _STL_VERIFY(
            _Pos < static_cast<size_type>(_My_data._Mylast - _My_data._Myfirst), "vector subscript out of range");

any ideas on how i can fix this?

ive tested all of them and it doesnt seem like its a particlular one causing the error so i have no clu ehow to go foward