directx9 not rendering some images

[RobertSobral]

Following the example of rendering mode in directx9, I have some problems with images

Images like 8-bit BMP are not being rendered using function recommended by imgui D3DXCreateTextureFromFileInMemoryEx

I have a code example

void LoadTexture(const std::vector<uint8_t>& img, ImTextureID* mytexture) {
    if (img.empty() || !mytexture)
        return;

    IDirect3DTexture9* m_texture = nullptr;
    D3DXIMAGE_INFO d3xinfo = { 0 };

    HRESULT hr = D3DXCreateTextureFromFileInMemoryEx(
        MyDX9::pDevice,
        img.data(),
        static_cast<UINT>(img.size()),
        D3DX_DEFAULT_NONPOW2,
        D3DX_DEFAULT_NONPOW2,
        D3DX_DEFAULT,
        0,
        D3DFMT_UNKNOWN,
        D3DPOOL_DEFAULT,
        D3DX_DEFAULT,
        D3DX_DEFAULT,
        0,
        &d3xinfo,
        nullptr,
        &m_texture
    );

    if (FAILED(hr))
        return;

    *mytexture = reinterpret_cast<ImTextureID>(m_texture);
}

Renders several images, such as .TGA which is the one I use most, but the 8-bit BMP is not rendered, what can I do?