Problem in using wsgen tool

[sreenivas vemula]

When I try to use the wsgen tool I am getting the following error:

command : wsgen -classpath build/classes/ -wsdl -r WebRoot/WEB-INF/wsdl -s src -d build/classes/ com.mkyong.ws.ServerInfo

Error : MISSING SEI

I am following an example in http://javaeenotes.blogspot.in/2010/10/web-service-with-jax-ws-in-eclipse.html

Please assist.

Thanks in advance

Regards,
sreeni.