Thank you Zelefis for your reply
I thought the problem was that i have Vista as OS and there are many known compatibility issues whit this game
I hope i will be able to use the new cheats, at least at the beginning of a new school year, when they are very useful to create a large clique and to explore the new features of the dlc (abilities, adventures , etc, etc)
thanks again for your modder work and to Legate for his amenability on this forum