Script not working only on a computer

Hi, I remember I had similar problems in the past, but I can't recall how I solved.

Foreword: I had to install X-notifier on a new computer, and when setting up a "libero" account I discovered I forgot the account's password. Therefore I had to follow the procedure to obtain a new password, that I did with success.

Now my problem: I installed X-notifier with the script in the new computer, and everything works.