S4 Hana - HCI - C4C error: No IDoc saved in target system (SOAP HTTP)

Hi,

I set-up an organizational structure replication from S4 Hana to C4C using HCI / CPI.

In S4 Hana, i encountered an error in IDOC:

No IDoc saved in target system (SOAP HTTP)

upon checking in tail log in Eclipse, this is the error:

2017 06 19 08:24:53#+00#ERROR#com.sap.esb.application.services.cxf.interceptor.AuthorizationInterceptor##S0017017149#http-bio-8041-exec-6#na#avshcie#e1251iflmap#web#ce570c777#Unauthorized. Endpoint configured for client-certificate authentication was called with basic authentication.|

I already assigned the rolse ESBMessaging,send in SAP Cloud Platform Cockpit.

Kindly suggest if I missed out something?

Thanks,

Aileen Sotelo