Test Plan Management . Test cases not vivsible

Dear Experts,

We are configuration SAP Solution Manager 7.2 SPS07 for Test Suite.

When creating a test plan we do not see test cases.

1. Run tr. Solman_workcenter
2. Choose from the list Test suite
3. Open Test Plan Management
4. Click Test Plan
5. Click Create
6. Go to Test Case Selection
7. Not visible Test Cases this tab