1) your form tag does not have a method attribute set:
this will cause the form to use the get method. captcha validation will only work for a form that uses the POST method:
<form id="frmContact" method="post">
2) accessing the file that generates the captcha image:
gives a number of errors referencing the open base dir restriction, captcha valuidation will not work on a server where the open_basedir restriction prevents access to the supporting files.
the errror is saying that webassist/captcha/fonts directory is not in the allowed paths, this directory will need to be added to the servers allowed paths also, if i try to access the font file directly:
i get a 404 error meaning this has not been uploaded to the server.