The "System Administration" menu is not displayed on the portal

Colleagues, I ask advice.

We have a three-system portal landscape based on SAP NetWeaver 7.50.
On the test portal I can not visualize (display) the menu "System Administration".
There is a menu on the development portal and on the productive portal.

What I tried:

1. Logged in as Administrator
2. Added a superadmin role to the user (Super Admin - pcd: portal_content / com.sap.pct / administrator / super_admin / com.sap.portal.super_admin_role)
3. Adds the role of the system administrator (System Admin - pcd: portal_content / com.sap.pct / administrator / system_admin / com.sap.portal.system_admin_role)
4. Added all roles and groups found by templates *adm, adm*, *adm*.

Nothing helps.
What could be the problem?
I will be grateful for any hint.