there is no item in PCD after BP ESS is deployed sucessfully

Hi all,

To install BP ESS, I already set up a portal 7.0 and assigned correct proper roles to users. But once I opened ess tab, the following error would appear:

<i>Portal Runtime Error.

...

Exception in SAP Application Integrator occured: Unknown system alias. System Alias: 'SAP_WebDynpro_XSS', User: 'xxxxxxx', Reason: System Alias is not defined or permission denied for this user.

Exception id: 02:07_20/09/07_0035_8101050</i>

I go to system administrator / system configuration and want to modify system alias, but there is no item to display.

Any suggestion will be highly appreciated.

Julian