Fallout New vegas Lonesome road wont run

I recently downloaded installed and complete the honest hearts add-on for fallout NV. I have just downloaded the lonesome road add-on and installed it and it shows up in the data files but what i launch the game not is different and all that shows up in 'downloadable content' is the honest hearts add-on. How can I make the lonesome road add-on work? Thanks

i played for about an hour and nothing happened