running OES1SP2, our LDAP certificates has expired because they only are valid for 2 year :(

I need to recreate them, how to do this?

I have only found a way to do this through iManager, but this doesn't work in my environment. Everytime I try to browse to certificates in iManager I get http error 500 :( After this I need to restart apache and tomcat.

Can I do this through C1?

Plz respond quickly if you can help me.