Probleme tidy

Hello all

Do you know how use tidy with Jahia?
In fact normally it's used with the HTMLAREA, the option is checked on
the administration.

But if you look on htmlarea, the editor create lot of <BR> whose are not
compatible xhtml. 

I want to use tidy to generate xhtml or XMl code.

To do that in the file 
tomcat\webapps\jahia\WEB-INF\etc\config\tidy.properties 

I have set the both properties: 

output-xml = yes
output-xhtml = yes

But no changes have been detected, and I still have <BR> or <HR> ...

If anyone have a idea?

Thanks for your help.

Nicolas