Error while calling proxy from adapter module

Hi

we are trying to call the RFC, SALERT_CREATE, from the Adapter module.we have created the webservice for the rfc and created the deployable proxy for the same. Then we have deployed the proxy in the J2EE stack.
Now I need to create the call to the proxy. But I am un able to do so.
I am following the help document for this as below :
http://help.sap.com/saphelp_nw73/helpdata/en/88/a552908d4c44dc99b3ec247069921e/frameset.htm

But it give me error while coding as : Cannot find the class file for javax.jws.WebParam$Mode. Fix the build path then try building this project

I have added the jar file to the project.

Please provide your inputs on this issue.

Regards,

Deepak