Ok, the search page looks ok. The trick to being able to use Dynamic Dropdowns is to make sure your data is organized correctly. It looks like you are trying to limit the categories based on the date. How do the dates you have listed relate to the categories? You should have it setup in a way that the parent table (dates) has individual records that relate to multiple children records (categories). If your data is not organized like this it would not make sense to use Dynamic Dropdowns.