Sims3 Dragon Valley will not play

[mswimm1981]

it's taken two days of trying, but I fianlly got the game to say it is installed. However when I got to play it it tells me to put in the regular sims 3 disc...which i did just to see if it would make it work ..and it did not work, nothing from the new game was loaded. just the origional game opened. how do I get this to work?  

[rumbutter]

 dragon valley is world so your game will still play form the game you normally play from, your regular disk the world to play it insert your disk you play then in the main menu +new game is where you find the world to select playing in the world the clothes you send a sim to a dresser-option- plan outfit to change into the new clothes use a mirror-option-change appearance-to select a new hair  the rest of the items will be in build/buy mode

edit typo