Captcha Problem

I have a proxy script within a script that shows external directory websites like: [login to view URL] The problem we are having is with the captchas on the external pages within the proxy. When we submit on the external website that's in the proxy, the form doesn't submit. The script we used is this one: [login to view URL] I need someone who knows how to fix this problem and if it's possible, show me an example.