Ok, i finally find it.
If u set Show intro text on "show", seblod doesn't fill the "fulltext" sql field with "::cck::11::/cck::" infos, so when you display an article it will show only intro text.
Now, i manually filled the fulltext field, disabled "show intro text" option everywhere and created a new article: it works!!! :D
Thanks a lot
X_Ch4n