Ok more help with the sims 2 plesse! HURRY!!!!?

ok i have done everything i possibly can to downlaod sims and lots from thesims2.com i click download on the item then i click run and after it finishes the body shop thing pops up and i click install and it says it has been successfull downloaded,. but when i play the game absoloutly nothing is there! so i tried saving it to my downloads folder and after i save everything i double click them and the body shop pops up. again i click install and the same thing happens but when i play the game still nothing is there! what am i doing wrong?. (i just installed the game , and no its not registered if that has anything to do with the problem) also i am lke reallly addicted to this game so please answer soon!!!!!!!!!!!