Ravioli is made using egg pasta, which is formed using eggs, salt and type 00 superfine flour if possible (find this here on Amazon).
However if you don't have this very fine flour, don't worry as general/all-purpose plain flour works just fine.
Also, if you have any trouble using the Kitchenaid equipment, you can make half-moon-shape ravioli (strictly 'pansotti') very easily, just by cutting circles with a cookie cutter or glass (see the ravioli recipes here for more info).
Hope that helps,
Matt
PS: On the subject of fresh pasta Debora, you might also find my Pastastic cookbook of interest, as this comes with printable versions of my fresh pasta making guides and exclusive downloadable videos of the same.
to make ravioli - the pasta roller and the ravioli maker. 