Hello,
this behavior you are describing may come from conflicts between MooTools and jQuery. If MooTools is present on your site, calls to $(document).ready... won't work. You need to use jQuery.noConflict() code and modify your custom code to jQuery(document).ready(function($) {...});
If you need more info, please use the links provided in the plugin and on the site. jQuery Easy should be able to help also.

No problem, the forum is moderated so the messages don't show up right away
I am about to turn off the computer for today so here is my advice.
You cannot have $(document).ready... or $(window).load on the site without having issues because of MooTools.
Loose $(window).load calls and replace them with jQuery(document).ready(function($) {...});
It is just better practice.
Any code inside the parenthesis can remain the same (you can use the $ symbol inside them, it is safe). That is all you need to modify. Make sure you also have jQuery.noConflict(); called before that.
Good luck!