zend_optimizer.license_path problem


I got this message when I try to use zend optimizer:
PHP Warning: No license for this product (‘name’) - make sure zend_optimizer.license_path is properly configured in php.ini!

I defined it in php.ini and everything is working well, but how to define separate paths for different domains? I tried it in vhost_…conf, but after restart apache it will show me errors.

How to setup domains with own path please?

Thank you.

more informations:
Syntax error on line 8 of /etc/httpd/conf.d/vhost_mydomain.conf:
Invalid command ‘zend_optimizer.license_path=/home/myuser/mydomain/html’, perhaps misspelled or defined by a module not included in the server configuration