Webdynpro CAPTCHA error java.lang.NoClassDefFoundError

Hi,

I was trying to test one CAPTCHA. So i followed the below blog

http://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/4512

But i am getting an error

The initial exception that caused the request to fail, was:

java.lang.NoClassDefFoundError: com/octo/captcha/service/image/ImageCaptchaService

jcaptcha-all-1.0-RC3.jar & other jars are there in classpath.

I have added those as Used DC.

Any where we need to update the path???

Thanks,

Ram