Dear Nina,
thank you for the welcome. I have found here keys to Ven Buddhadhatta course:

http://www.tipitaka.net/pali/palidd/

On line is also available an entire audio Pali course by Ven. Bhikkhu Bodhi :

http://www.bodhimonastery.net/bm/about-buddhism/audio/55-a-course-in-the-pali-language.html

The course in mp3 audio format is on the text A New course in Reading Pali. It's totally free. You can copy and past the link in your browser because with rich text editor I tried to make functional the links but it did not work. The course is also easy to find on the site of bodhimonastery.

I have a question: the keys to Ven Buddhadhatta A New Pali course 2 will be added to the page Pali day by day with the answers to the other courses ? I thank you for this very useful page.
Best regards to all
Lorenzo