Could you see the log from connection and intrusion analysis?  if it work , accroding to your pic, i think your are config fine.  just make sure you've deploy the policy , and no firewall between sensor and syslog server, or open nessery port. if y...

If the syslog server is running with linux , you could use tcpdump command to make sure , is sourcefire not sending syslog , or the server syslog deamon not work? if it's running with windows, you could use wireshark for  figure out.