Issue in Managed System Configuration

Hi Experts,

We are facing an issue in Solman_Setup --> Managed System Configuration in Step 4 --> Assign Diagnostic Agent as below.

Our Solman details :

Solman 7.1 Sp12

Installed DAA in both Solman (sapserver1) and Managed system (sapserver2) and tried to connect with both, but no luck.

Any resolution to move forward will be greatly helpful..

Regards,

Krishna.M