Getting Error While Deploying AOT object to EP

Hi Team,

I have created flexible authentication on Dynamics AX 2012 R2 and sharepoint 2013 .
followed below link- I can See good stuff from EP Portal,
but,From AOT, Developers guys getting Error-
saying- 1. Could not retrieve a valid Windows identity &
2. The message could not be dispatched because the service at the endpoint address
'net.pipe://localhost/s4u/022694f3-9fbd-422b-b4b2-312e25dae2a2' is unavailable for the protocol of the address.
See Images of the Error @

Any suggestions appriciated-