Webservice Exception

Hi All,

I've developed an application which uses a webservice as a model. The webservice has some security features (Authentication through roles).When I access the webservice through webdynpro, I'm getting webservice call exception :

Exception Service call exception; nested exception is: com.sap.engine.services.webservices.jaxrpc.exceptions.InvalidResponseCodeException: Invalid Response Code: (401) Unauthorized. The requested URL was:"http://tempwas:50000/CreditCheck/Auth?style=document"

Can anybody know how to access authenticated webservice/

Any kind of help will be appreciated.

Abhinav Sharma