I do need technicians advice because i have no knowledge in programming.
As nothing worked with templates, i deleted all the forum files (and the huge work in it) in my site and i re-installed the forum as totally new with install.dat/.cgi.
Still, the same problem appears : eventhough the template files are modified (i downloaded them to check), the modifications do not appear for the visitors.
I followed your advices in your answer, but no result.
>>> Did you have such problems noticed by GForum users/webmasters ?
>>> Could that come from MySql and then what should i say to my provider ?
>>> Any other idea why it does not work ?
Thank you for your answer.
NB : Still all the other functions of GForum work correctly (The categories, the changes in the messages, ...). The templates only do not work.