http://wordpress.org/extend/plugins/easing-slider/
When this plugin is installed and activated the page Form is embedded on will refresh when the user clicks “Submit” instead of the form submission occurring via AJAX as it should which means the submission is never sent for moderation. A possible cause is that, by default, it loads an older version of jQuery instead of the current version bundled with WordPress. There is an option within Easing Slider to disable the loading of its version of jQuery. Please try this option to see if Form functions as expected.
NOTE: This FAQ was written based on Easing Slider 1.2.1