You can use both mySQL and MySQLi on the same site or even the same page without any issues. I looked at the code on the live page and it is still the original version. Are you sure you were updating and testing the correct file?
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.