Hi, This is my 3rd post regarding this issue of cropping a file into smaller (same format files) .Please some one help me with this.Here is my code :

CoInitialize(NULL);  
 //Create the FGM
 CoCreateInstance(CLSID_FilterGraph,NULL,CLSCTX_INPROC_SERVER,IID_IGraphBuilder,(void**)(&pGraphBuilder));  
 //Query the Interfaces  
 pGraphBuilder->QueryInterface(IID_IMediaControl,(void**)&pMediaControl);
 pGraphBuilder->QueryInterface(IID_IMediaEvent,(void**)&pMediaEvent);
 pGraphBuilder->QueryInterface(IID_IMediaPosition,(void**)&pMediaPosition);  
 //Adding a Filewriter before calling the renderfile    
 IBaseFilter *pWriter=NULL;  
 IFileSinkFilter *pSink=NULL;
 CoCreateInstance(CLSID_FileWriter,NULL,CLSCTX_INPROC_SERVER,IID_PPV_ARGS(&pWriter));
 pWriter->QueryInterface(IID_IFileSinkFilter,(void**)&pSink);  
 pSink->SetFileName(OUTFILE,NULL);  
 //Create a source filter   
 IBaseFilter* pSource=NULL;  
 HRESULT hr11=pGraphBuilder->AddSourceFilter(FILENAME,L"Source",&pSource);  
 //Create a AVI mux   
 IBaseFilter *pAVImux;  
 CoCreateInstance(CLSID_AviDest,NULL,CLSCTX_INPROC_SERVER,IID_PPV_ARGS(&pAVImux));
 pGraphBuilder->AddFilter(pAVImux,L"AVI Mux");  
 pGraphBuilder->AddFilter(pWriter,L"File Writer");  
 //Connect Source and Mux  
 IEnumPins* pEnum1=NULL;    
 IPin* pPin1=NULL;    
 IEnumPins *pEnum2=NULL;    
 IPin *pPin2=NULL;  
 pSource->EnumPins(&pEnum1);  
 pEnum1->Next(1,&pPin1,NULL);  
 HRESULT hr1=ConnectFilters(pGraphBuilder,pPin1,pAVImux);  
 //Mux to Writer  
 HRESULT hr4=ConnectFilters(pGraphBuilder,pAVImux,pWriter);  
 //Render the input file  
 HRESULT hr3=pGraphBuilder->RenderFile(FILENAME,NULL);  
 //Set Display times  
 pMediaPosition->put_CurrentPosition(0);  
 pMediaPosition->put_StopTime(2);  
 //Run the graph  
 HRESULT hr=pMediaControl->Run();

On running no video is shown. All the hresults return S_OK .A .avi file( larger than original is created) and I cannot play that file.