the issue is that some versions of IE do not send the submit button as part of the form submit in very small forms. The submit button is used as the trigger though.
the code change i gave you replaces the submit button named search with a hidden form element, this way the search will always trigger.
When i view source of your page, I do not see the change applied.
When making edits to the power store template, your power store files must be at the root of the Dreamweaver site for the changes to take effect on the child pages.