We have ASA 5550 (ver. 8.0.4). We configured the ASA so that messages can be sent to Syslog server. We were able to ping the Syslog server from the ASA. However, no messages are sent to the Syslog server. The Syslog server has been configured to accept messages from the ASA. Below is part of the config of the ASA. Thanks.
logging list Events level errors class auth
logging list Events level errors class session
logging list Events level errors class sys
logging console errors
logging asdm informational
logging mail errors
logging host Inside XXX.X.X.XXX