in your where clause, you are using AND between the conditions, so both First Name AND Last name must match.
it sounds like you want to use OR instead.
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.