Microsoft Dynamics Axapta Technical,Functional Coverage

I faced following error  on running ssrs report. Reports working for all user except one user. Error Description from Event log viewer. 1.Error No.1 An error has occurred in the services framework.  Method: AifMessageInspector::AfterReceiveRequest.  Error: System.ServiceModel.FaultException: Failed to logon to Microsoft Dynamics AX.    at Microsoft.Dynamics.Ax.Services.AxServiceOperationContext.InitializeSession()    at Microsoft.Dynamics.Ax.Services.AxServiceOperationContext.InitializeContext()    at Microsoft.Dynamics.Ax.Services.AxServiceOperationContext.Attach(OperationContext owner)    at System.ServiceModel.ExtensionCollection`1.InsertItem(Int32 index, IExtension`1 item)    at System.Collections.Generic.SynchronizedCollection`1.Add(T item) 2.Error No.2 An error has occurred in the services framework.  Method: AifMessageInspector::AfterReceiveRequest.  Error: System.ServiceModel.FaultExceptio...