This collection already contains an address with scheme http. There can be at most one address per scheme in this collection.

See more:

WCFServices

I'm Having above error.I'm already Included the following code in my web config.

<system.serviceModel> 
     <serviceHostingEnvironment> 
          <baseAddressPrefixFilters> 
               <add prefix="http://www.abc.com; 
          </baseAddressPrefixFilters> 
     </serviceHostingEnvironment> 
</system.serviceModel>

but still having the same error.