WCF Service Error

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C#2.0

C#

Hi every one,
I have WCF service. I want to use that in the C# class library.
for this i have added this WCF as service reference.
I have used the class channel factory and provided all the necessary credentials.
Channel opend perfectly but I am getting the following error.
"The HTTP request is unauthorized with client authentication scheme Basic. The authentication header received from the server was
Basic realm="Idc Security /idc/idcplg".

Can any one suggest me where I did wrong?
Thank you
Raj..