debug php contactform

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I installed a php contact form ([url removed, login to view] v5.0) which I used a lot on other website, and works just fine there. But now it doesn't seem to work on this new site. When hitting submit I get an error. I need help to fix this problem asap.

Skills required:
HTML, Javascript, PHP
About the employer:
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