[xwiki-users] XEM : Cannot acces to the main wiki (manager wiki)

Hello, I'm afraid I can't access anymore to the main wiki (the one who can manage all wikis). I have made a few DNS / httpd.conf updates, for accessibility reasons, but I'm not sure that main wiki worked fine just before... so I'm not sure that's the reason. Each wiki (included main wiki) is on a secured URL : https://main.me.com/xwiki/bin/view/Main/ https://first.me.com/xwiki/bin/view/Main/ https://second.me.com/xwiki/bin/view/Main/... I have a static page on https://main.me.com/index.htm => OK => So I think DNS is not the problem, nor Apache config file. Apache (in front of Tomcat 6.0) logs show some 302 error code. And access to main wiki redirect to the wiki "xwiki.virtual.redirect=" defined int oxwiki.cfg. Is there any test I can do to understand what happened to the main wiki ? thanks for any idea... Gaëtan GUYODO