Php sessions expiring

Hey everyone. My php sessions are expiring too soon, it seems like after the default of about 20 some minutes?

I believe I have my phprc setup correctly as in my phpinfo() I see this…

session.cookie_lifetime 86400 86400
session.gc_maxlifetime 86400 86400

Any idea why my session would be expiring after 20 some minutes? Is there something else I need to set to extend the session?