Thank you Marco.
I did not make any change to files. All I did is the installation of the admin tool on the forum directory.
Two last questions please

- Is there any files I should keep in the forum's directory? In other words, what are the files to be cleared before re-uploading the fresh copy?
- After re-uploading the fresh copy by an FTP tool in the same old directory, should I go through the installation process again?
Once again thank you very much for the good news you cheered me up with, that I'm not going to lose my forum.
Best regards.
Ehab