Certificate does not set for web site

Hi,

I have installed a brand new mac mini with Mac OS X Mountain Lion (10.8.2) and installed the server app on it (2.1.1). I've configured all the network, set a network label and added a brand new and valid certificate.

Problem is, Each time I set the certificate for the web site and Open Directory, nothing hapend and the config stay at none fpr the certificate.

Also, I have these error in /Library/Logs/Webserver/Error_log

[Tue Oct 30 13:56:02 2012] [crit] (17)File exists: mod_rewrite: Parent could not create RewriteLock file /var/log/apache2/rewrite.lock

Configuration Failed

[Tue Oct 30 13:56:12 2012] [error] Server should be SSL-aware but has no certificate configured [Hint: SSLCertificateFile] (/Library/Server/Web/Config/apache2/sites/0000_any_443_.conf:23)

Is anyone have an idea ?

Sébastien