No bandwidth stats

No bandwidth stats

Hi All

We have a cisco ASA 5520 with the following config

logging enable
logging timestamp
logging trap informational
logging asdm notifications
logging device-id context-name
logging host cptint x.x.x.x
logging host cptint x.x.x.x

The fwanalyzer is pulling through stats on hits and blocks and to's and from's and so on but there is not bandwidth information... everything is 0Kb and 0%

Any ideas, i have checked out syslog server and it show in the logs that it is reporting size of packets going through the firewall