I've recently turned on Global Correlation but we've failed to update every 5 minutes.PL-ASA-IPS# show stat globalNetwork Participation: Counters: Total Connection Attempts = 2 Total Connection Failures = 0 Connection Failures Since ...
A few hours of searching led me to find out that the problem was being caused by an ASA/Websense combo. I has to tell the ASA to not apply filtering rules (HTTP and HTTPS) to the IPS' IP address.Within minutes this fixed the issue.