Base constructor problem.

Hello, I have implemented a video render filter based on the CBaseVideoRenderer interface. However when I compile I get the following runtime error: TEXTURE3D9 caused an exception 03H in module KERNEL32.DLL at 0167:bff768a1. Registers: EAX=00000000 CS=0167 EIP=bff768a1 EFLGS=00000202 EBX=005a0000 SS=016f ESP=007af454 EBP=007af45c ECX=00000001 DS=016f ESI=007af458 FS=4f27 EDX=00415b70 ES=016f EDI=007afc80 GS=0000 Bytes at CS:EIP: c3 cc cc 55 8b ec 56 57 68 c0 94 fc bf e8 01 d9 Stack dump: 004169dd 007afc94 007afc80 00416190 00456d40 00456d68 0000007d 00000000 007afc94 cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc I have narrowed this down to when the constructor for the CBaseVideoRenderer is called when the CTextureRenderer constructor is called as follows:

CTextureRenderer::CTextureRenderer( LPUNKNOWN pUnk, HRESULT phr ) 
                                  : CBaseVideoRenderer(__uuidof(CLSID_TextureRenderer), 
                                    NAME("Texture Renderer"), pUnk, phr) 
{ 
    // Store and AddRef the texture for our use. 

    ASSERT(phr); 
    if (phr) 
        *phr = S_OK; 
}

I cant understand this problem as I seem to have followed what was done in the samples. If it helps the GUID is defined as: struct __declspec(uuid("{71771540-2017-11cf-ae26-0020afd79767}")) CLSID_TextureRenderer; Thank you in advance. Mark Coleman