I have seen this issue before. It normally fell under one of the following:
1) Known issue resolved in SP04 where the SMP Server couldn't display any information from the Agentry Server
2) The certificate created was named AgentryServer.pfx and (or) the [Server Administration] section of the Agentry.ini was updated to the custom certificate.
- For this make sure the custom cert is not AgentryServer.pfx and have the default AgentryServer.pfx file with the server. Update the [ANGEL Front End] section to the new custom cert name, and set [Server Administration] to the default AgentryServer.pfx information.
Stephen