I'm not familiar with the Cisco Firewall add on, so this is pretty general advice...
Have you attempted to manually run any of the searches used by the various views? Often if you dissect the search you can track down the root issue. You may want to start with just the very core search command (which is the part of the search before the first pipe (|) character) and make sure that is returning events. If it is not, then figure that out first. If you are getting events, then try rebuilding the search adding one search command at a time until you figure out at which point the problem is occurring.
If you can find a more specific reason (or eliminate possible reasons) as to why you are having this problem, you can add additional details to you question here (use the "edit" link under your question) and hopefully someone here can point you in the right direction.
