SRM Portal not loading properly

Hello SAP Community,

I implemented a whole SRM System for multiple backendu2019s.

We are using SRM 7.0 and ECC 6.0 combined with SAP Netweaver.

We installed the SRM Portal Layer on the Netweaver client as well.

All required Services are activated and posted.

All required set ups are finished and checked twice.

When I access SRM directly in Netweaver everything is working fine. I can create Shopping Carts and check the reports or approve Shopping Cart. I can access all screens.

When I access SRM in the portal I canu2019t do anything. Once I clicked on any tab the system will just open the home screen in the home screen where the shopping cart creation part shot appear.

When I then click on any function SRM is logging me off.

Did anybody of you came across this problem before and can help me to solve this issue.

Thank you!