how to configure wcf service to local iis5.1

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ASP.NET

WCF

LINQ

Hi,

I Developed One Asp.Net Website.In This Application I wrote Wcf Service with Linq to Sql.Some Times It is Working Fine.But Some Times It is Showing Error Like Below:
.........
There was no endpoint listening at http://localhost:1034/FirstGuardian/WcfService.svc that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details.
.........

When This Error Came I Deleted the Wcf Service Reference and Again I added The Wcf Service Reference Then It is Working Fine.

But I Need A Solution For This.Because Every time it is required to Add service reference when error came like above.

So Please any one give some solution to my problem.

Thanks,
Vijay