try to install the latest code to use all new features with the device.After the proper installation and having all the required license including Firesight host license you need to make sure that the traffic has been properly redirected to pass through the Firepower.If the Firepower is redirecting the traffic you can see the same by enabling the logging under the access control policy by Policies > Access Control > Rules > Logging > Logging at beginning of connection or Logging at end of connection . Once after enabling logging, save and reapply or redeploy the policy changes. Each device has its own database connection settings. So you can refer the following link and see how much of events can be logged in the device.
http://www.cisco.com/c/en/us/td/docs/security/firesight/541/user-guide/F...
If you can see the respective connection events under Analysis > Connection Events , the dashboard data also should populate . If you already enabled the above and still no events are coming up then please perform the following by the login to Firesight CLI by elevating to root user.
1) Verify the following service is running
pmtool status | grep SFTop10Cacher
2) Restart the service
pmtool restartbyid SFTop10Cacher
3) You should see the service as running with a different pid
pmtool status | grep SFTop10Cacher
Verify the dashboard after 30 minutes.
