ESS(WDA) in EP - ESS page opening, but individual service is not opening

Question

Hi all,
we are using EP for hosting the ESS (WDA) services.
We are using the standard role 'Employee Self Services'.
in the iView, we can see the application is HRESS_A_MENU and the configuration name is HRESS_AC_MENU
In EP, when we click on the Employee Self Services role, the main page is opening properly.
but when we click on individual service, like personal profile, it is not opening in new or same window. It basically does nothing.
when we check the ESS services, on ECC directly, it is opening the main page properly with below url.
http://eccserver:nnnn/sap/bc/webdynpro/sap/hress_a_menu?sap-language=EN&sap-wd-configId=HRESS_AC_MENU
it is opening the Employee Services page. when we click on the individual services, e.g. Personal profile, it is opening properly in new window.
http://eccserver:nnnn/sap/bc/webdynpro/sap/hress_a_persinfo?sap-wd-configid=HRESS_AC_PERSINFO&sap-accessibility=
in EP, what do we need to additionally to get the individual service to open properly.
thanks in advance,
Madhu_1980

Answer 1

thanks for your inputs.
finally after doing following things it worked.
accessed both EP and ECC using FQDN, not by using IP.
made sure both EP and ECC in same security zone. (https in our case)
applied the BP ERP common roles, set permission to every_user group.
created additional aliases for the system object:
SAP_HCM_PROXY
SAP_LocalSystem
SAP_ECC_HumanResources
logically i understood the purpose of alias SAP_ECC_HumanResources, but could not understand the need for adding SAP_HCM_PROXY and SAP_LocalSystem aliases for the same system object.