The Policy Server Connection Status is determined by perl scripts running in the EPAgent that reports data to the Enterprise Manager.
The metrics about User Store / Key Store are reported by using the Introscope Event Handler which writes the data into a shared memory segment that we read from to send the metrics across.
So I would check if you have any errors about the event handler not loading - if so, check the environment variables of the Policy Server, look for the variables defined in smm_env.sh to confirm they have been loaded.
Also run
./IntroscopeNativeDataReporter.sh -list
from the SiteminderManager install, see if there is anything attached, any metric showing there. If you see attached as 0, it means the plugin/event handler isn't loading correctly.
Also run ./IntroscopeNativeDataReporter.sh -debug and leave it for a few minutes then do
./IntroscopeNativeDataReporter.sh -debugOFF and check for any metrics or error messages in IntroscopeAPI.log, which will be in the /data folder of SiteminderManagerAgent.
All of that would be leading you to a support case, more than something that can be figured out over community.
There is also a newer integration available for download (CA Application Performance Management for CA Single Sign-On (CA APM for CA SSO) - MULTI-PLATFORM version 13, which has a slightly different mechanism, if you are only just starting out with this integration, you might consider this option too - it avoids the use of shared memory segment which has sometimes led to problems with the previous integration architecture.