343453 Fix wordpress plugin script

I hired a programmer to build a wordpress plugin script, he built the script and showed me a working demo on his servers but then when i tried to install the script on my domain, the plugin didn't work. I tried to contact this programmer but he is not responding to my emails. I need a expert in PHP and twitter API to look at my code and find out why the script is not working. It's a very simple script and you can probably fix within a few minutes after looking at the code. It's a simple script thats posts new wordpress posts to twitter.