CAPTCHA Error: Session not started. The CAPTCHA cannot be used!

I have a joomla 3.2 site and a zencart 1.5.0 store. When I click on the link that goes to the contact us page in zencart this message shows: "CAPTCHA Error: Session not started. The CAPTCHA cannot be used!" If I reload the page the contact us page shows and no more problems, however a new customer doesn't know to do this! Is there a way to disable the captcha on the contact us page. I'm not interested in having it, and hope that it will solve this issue.

Thanks much.

There is no CAPTCHA built-in to Zen Cart, so it must be coming from a plugin you've installed.
(The latest ZC version uses a different anti-spam approach instead of those unfriendly captchas.)

You have various options:
a) remove the plugin if you no longer need it
b) turn off the plugin if it has a switch/setting in the Admin for doing that
c) post a question for help with it in that plugin's existing Support Thread so that the author and other users of that plugin know that you've got a question about it, and so they can respond