Clicking the triggers, in Chrome, in the link below works for you?
When I click on the "trigger" they do not expand on my site. For some reason clicking the "triggers" only works in Internet Explorer for me. Yes I can see they are working on your website, in all browsers.
Yes I am on version 1.3.17 of Collapse-O-Matic and version 3.3.1 of WordPress.
I am just trying to get it to work on my site to expand on most browsers, and currently they do not. It seems like I am doing something wrong with the code.. but then why would it work in IE and not work elsewhere?
Another thing i noticed, when I go to look at my Installed Plug-Ins, and click "Edit" next to the 'jQuery Collapse-O-Matic" I can see that the PHP of the Plugin says "active"
However, when I click on the CSS and the JS plugin files to open them in editor, they say they are "inactive"
Despite this, jQuery Collapse-O-Matic is listed as an "Active" plug in, when I am in the "Installed Plugins" summary view.
Thank you for your time and patience with taking a look at this.