Are you familiar with using Firebug / Chrome Console to troubleshoot javascript issues? The first thing I would check is if you’re seeing any jQuery conflict/error happening in console when you try to run that..??
Are you able to temporarily disable other plugins to see if the issue goes away, and if so, then re-enable each one-by-one until the problem comes back to find the conflicting plugin? That’s usually what’s going on when this sort of thing happens. It could also be a conflict in the theme if you don’t find a conflicting plugin.
Another thing that could potentially cause issues is any caching / CDN tools you may be running. It’s good to temporarily disable those for troubleshooting as well.
The first step is to find that conflict, and then we could try to reproduce and make necessary adjustments to fix it.
