Strange, do you have all the DLCs? Also, please check your MODs folder, can you see all the Vox Populi components? They might vary a bit depending on the type of installation you had chosen, but basically you should see folders (1) - (5) and then (6a) or (6b) there. Another thing to check is if you are not subscribed to the Community Patch part or the More Luxuries mod or Civ4 Diplo on Steam - if you are, unsubscribe and reinstall VP. Community Patch includes Whoward's DLL and shares the mod ID with it, so if you have Whoward's Various DLL components in the MODs folder or any other mod using it, delete them.