Dear Lord of the Rings ! thank you but inspite of your fast answer, I had already thrown all data/preferences about LW 4, so without keeping any of the old data I could not follow your advice totally, and now I just redownloaded the version 5.5.8, allowing it in the firevault... BUT still it doesn't work, so if you have any patience left could you just tell me what to do now I guess as a new user of LW and not any more as an old one.