recaptcha refresh button in django

I am using recaptcha django form following this tutorial . It works fine only the little refresh button not working on 开发者_如何学运维the recaptcha image. Not sure what is going on.

the generated code of recaptcha

<script>var RecaptchaOptions = {theme : 'white'};</script><script type="text/javascript" src="http://api.recaptcha.net/challenge?k=6Lc6YLoSAAAAAAFKV5Y13hyLIl4y845XIUIQY-EN"></script> 

<noscript> 
  <iframe src="http://api.recaptcha.net/noscript?k=6Lc6YLoSAAAAAAFKV5Y13hyLIl4y845XIUIQY-EN" 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> 

Thanks

Never mind... It is my css causing the problem. If i remove my css it is working cool.