And for the LOGS... Maybe, the pb is on this code :
[Mon Nov 19 14:50:34 2012] [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Mon Nov 19 14:50:34 2012] [warn] RSA server certificate CommonName (CN) `server1.example.com' does NOT match server name!?
The first message is usually the result of using a self-signed certificate, which is, by definition, a CA certificate. If you are not using a self-signed certificate, then something is misconfigured.
The second message means that the effective "ServerName" directive value (usually defined at the vhost level) does not match the SSL certificate's "CommonName" field.
Neither of these messages should cause Apache to fail to start. So, the problem seems to be elsewhere.
Please provide more background on what exactly you are trying to achieve, and the exact steps that you are taking in the process.
Are you trying to install a valid, CA-signed certificate for a website that you created with ISPConfig? Or are you trying to generate your own self-signed certificate on the command-line and then paste it into ISPConfig? Or are you trying to secure ISPConfig itself with an SSL certificate?
We need more details to be able to help. And please avoid using shorthand in your posts, such as "pb" for what I assume to be "problem".