FOSS gamedev and creative worlds

Hi, i'm new player of minetest, and i have a little problems with mods. I create a mods folder in data folder, and i extract mods in folders. When i play the game, the mods didn't work.

your using o.3, mods are not enabled in this version, get this one
latest dev http://c55.me/blog/?p=953

Where i must extract the mods folders?

there a "mods" folder in the root directory copy mods there.

I don't know what's wrong, didn't work. Folder structure:
bin builtin cache doc games mods textures worlds
|
mesetint particles

And i haven't got a particles.