CMS & WordPress
I dont know if it is the right place but..
Already three times I've been adding plugins in WP (contact form7, postTabs, wp-tabs-slides) and my slide initial sets down whole.
I wonder why this happens.
Sometimes if another JS library is installed it can conflict with jQuery, but there are fixes for that. Unless someone here is very familiar with the plugin, it might be best to post a link to the site so we can look under the hood and see what might be breaking the script.
check out your css styles for the elements. Most likely your width is set too large for your page...