WCF Service host in Windows service

I create WCF service library and i test that working fine on WCF Test client(default). when i host the WCF service in winodws service that time i got the error. I am using windows XP sp3, .Net 3.5 and Visual Studio 2008.

Error opening host : HTTP could not register URL "http://+:8731/WCFServerDLL/Service1/." Your process does not have access rights to this namespace (see "http://go.microsoft.com/fwlink/?LinkId=70353" for details).

the above link for microsoft to given and refer to implement the httpcfg.
Here i run the "httpcfg.exe set urlacl /u http://localhost:8731/WCFServerDLL/Service1/ /a"

i get the result

HttpSetServiceConfiguration completed with 0.
I got same issue, what is the problem? can you give me a suggation.

Why is the a + sign in the url?

Quote:

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Originally Posted by Lightning

Why is the a + sign in the url?

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+ sign,that is Error message as created by .Net for 'localhost'.