Yang,
The Agentry in SMP3 is using websockets in the communication layer. Websockets uses URLs for the server connection details. Do to this change the servers are not going to be listed anymore in the ATE.
You will need to enter the server information by clicking on the Other button on the Please select server dialog and entering the URL for the connection to the SMP 3.0/Agentry application.
The format for the connection URL is:
https://{servername}:8081/{sub-url}
The Server name must match what is on the certificate SMP 3.0 is using. The certificate is located at c:\SAP\MobilePlatform3\Server\configuration\smp_crt.cer
The Sub-URL must match what your server is using from the applciation definitions and is case sensitive. The sub-URL can be found in the startup.log in c:\SAP\MobilePlatform3\Server\Log\Agentry directory.
Once you have this information you can test if the server is listening by opening your web browser and entering the URL. If you get back "I am here!" as the response you are ready to try connecting from the ATE. If however you get a certificate error or don't get the "I am here!" response you should first troubleshoot that.
--Bill