Problems with backbuffer and EndScene hook - c++

Question

So, i've been trying to retrieve the backbuffer data using a EndScene hook, the thing is that for some reason my GetBackBuffer is returning a invalid result (i think) because when i use pSurface->GetDesc() it returns that the backbuffer has Width 1 and height 1, and it always return the pBits filled with 0.
HRESULT WINAPI hkEndScene(LPDIRECT3DDEVICE9 pDevice)
{
IDirect3DSurface9* pSurface = 0;
IDirect3DSurface9* pBBuffer = 0;
D3DLOCKED_RECT Lock;
D3DSURFACE_DESC desc;
if (pDevice->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &pSurface) != D3D_OK)
{
logg << "ERROR GetBackBuffer: " << GetLastError() << endl;
return pEndScene(pDevice);
}
pSurface->GetDesc(&desc);
logg << "Size: " << desc.Width << ", " << desc.Height << endl;
HRESULT hRes = pDevice->CreateOffscreenPlainSurface(desc.Width, desc.Height, desc.Format, D3DPOOL_SYSTEMMEM, &pBBuffer, NULL);
if (hRes != D3D_OK)
{
logg << "ERROR CreateOffscreenPlainSurface: " << GetLastError() << endl;
return pEndScene(pDevice);
}
hRes = pDevice->GetRenderTargetData(pSurface, pBBuffer);
if (hRes != D3D_OK)
{
logg << "ERROR GetRenderTargetData: " << GetLastError() << endl;
return pEndScene(pDevice);
}
pBBuffer->LockRect(&Lock, NULL, D3DLOCK_READONLY);
Com.DrawBuffer(Lock.pBits);
logg << Lock.pBits << endl;
//Usual free memory functions
pSurface->Release();
pBBuffer->UnlockRect();
pBBuffer->Release();
return pEndScene(pDevice);
}