How to call one windows WCF service from another windows WCF service

See more:

WCF

Hi,
I have one Windows WCF service using net tcpbinding (hosted in windows)Same service i am using as client service and server service. Client service creates dynamic proxy using factory channel based on given IPAddress When both systems are in domain then working fine.
When we remove domain means when systems are in workgroup then its not working.

What do i need to change and where to access the server service from client service in non domain environment (work group).

Thanks
Sanjay

What I have tried:

I tried by setting following attribute
security mode none , receivetimeout,sendtimeout,closetimeout, <serviceThrottling maxConcurrentCalls="500"
maxConcurrentInstances ="100"
maxConcurrentSessions ="200"/>