Webservice references are not updating while configuring it

Hi All,

I configured this web service and it was working fine but due to some changes at vendor side who created this web service and now when I tried to update or configure service references I am getting following error.

"Metadata contains a reference that cannot be resolved: ‘service:8000/…/service.svc’.

There was no endpoint listening at server:8000/…/service.svc that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details.

The remote server returned an error: (404) Not Found.

If the service is defined in the current solution, try building the solution and adding the service reference again."

Can anyone please give me any pointer which I can look into or have to inform other third party vendor so they can also check at their side.