Thank you !! It now seems to be working well. Have to learn how to use it now :)
Thank you for your comments and tests.
Some tips.
1. Press "New"
2. If you need more maximum particles increase Buffer and press "Reset".
3. Use Emit to produce some particles (Emit < Buffer)
4. Set Emission Rate to automatically produce particles (Emission Rate < Buffer)
5. Maybe you like Spread. Try to set 6.28.