Captcha image not generating

Hello,

I developed a form by using Contact Form 7 plugin.
The form contains captcha too. The captcha was working perfectly but it’s not working for some days. I think it’s due to any bug in updated plugin.

The problem is that when I first load the page than it shows broken image instead of captcha image. I checked and found that the image is not generating in the “/wp-content/uploads/wpcf7_captcha/” directly.

But when I click submit on the form (without filling any form) and when any validation error occur, than the captcha is generated and loading perfectly.

So the problem is the captcha is not generated on page load. But it’s generated by Ajax when I submit form and validation error occur.

Anyone help me on this?

http://wordpress.org/extend/plugins/contact-form-7/