well, your search_results.php page has no recordset code on it and no data assist search code.
use the data assist wizard to recreate the search and results page.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.