recaptcah is not working on google crome 16 browser

[Rahul Singh]

Hi I am facing issue with google crome 16 browser as it is not showing recaptcha.
Kindly refer attached screen shot.

i am using below code

<script type="text/javascript" src="https://www.google.com/recaptcha/api/challenge?k=6LeT8ecSAAAAAHy-lHWxtCTthU5P9FxeLFIp0hTU">

 </script>
 <noscript>
   <iframe src="https://www.google.com/recaptcha/api/noscript?k=6LeT8ecSAAAAAHy-lHWxtCTthU5P9FxeLFIp0hTU"
       height="300" width="500" frameborder="0"></iframe><br>
      <textarea name="recaptcha_challenge_field" rows="3" cols="40">
    
   </textarea>
   <input type="hidden" name="recaptcha_response_field"
       value="manual_challenge">
 </noscript>

it is showing error for https://www.google.com/recaptcha/api/challenge?k=6LeT8ecSAAAAAHy-lHWxtCTthU5P9FxeLFIp0hTU