The correct order to install them is by release date. Once all are installed, if I remember right you should play from the disc of the last one installed (Makin' Magic in your case). Here's the release order of all the expansions:
The Sims: Livin' Large
The Sims: House Party
The Sims: Hot Date
The Sims: Vacation
The Sims: Unleashed
The Sims: Superstar
The Sims: Makin' Magic
Since you said you've installed them in this order, which disc are you using to try to play the game?
The Sims is notorious for this little problem. Can't believe they never did anything to fix it or simplify it.
