There is no code on the page that would ever send you to a page with ?sent=false
You can debug the captcha by replacing this line:
echo("Spam test failed");
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.