You need to check if the plugin is running. The most likely reason would be caching so be sure to flush your cache and disable your caching plugin while configuring JCH Optimize.
Check the source of the page for the JCH generated combined file. It looks like this:
http://yourwebsite.com/wp-content/plugins/jch-optimize/assets/wp-content/plugins/gz/30/0/381259820a40ccb26059b76d87c406a7.css
If you’re not seeing that turn on ‘Log caught exceptions’ in Advanced Options and check for logs in /wp-content/plugins/jch-optimize/logs/jch-optimize.log and the log would tell you why the plugin didn’t run. Try to correct the issue and try the plugin again.
