UpdateResource не обновляет ресурс

HANDLE swfFileHandle = CreateFile(swfFile.c_str(), GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
 if (swfFileHandle != INVALID_HANDLE_VALUE)
    {DWORD fileSize, bytesToRead;
     LPVOID swfBuffer;
     fileSize = GetFileSize(swfFileHandle, NULL);
     swfBuffer = new BYTE[fileSize];
     if (ReadFile(swfFileHandle, swfBuffer, fileSize, &bytesToRead, NULL))
        {HANDLE resFileHandle = BeginUpdateResource(scrFile.c_str(), FALSE);
         if (resFileHandle)
            {if (UpdateResource(resFileHandle, RT_RCDATA, "FLASH", MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPVOID) swfBuffer, fileSize))
                {
                 if (EndUpdateResource(resFileHandle, FALSE))
                     Label3->Caption = "Updated successfully!";
                 else Label3->Caption = "Error in EndUpdateResource";
                 }
             else Label3->Caption = "Error in UpdateResource";
             }
         else Label3->Caption = "Error in BeginUpdateResource";
         }
     else Label3->Caption = "Error while reading swf file";
     delete [] swfBuffer;
     CloseHandle(swfFileHandle);
     }
 else Label3->Caption = "Error when opeining swf file";