Hi,
TCP RESET-O would mean that the connection is being terminated from the outside.
Is that expected ? If yes , i don't think extending this connection will solve the issue.
You can use this command:- sysopt connection timewait which is disabled by default
http://www.cisco.com/c/en/us/td/docs/security/asa/asa-command-reference/S/cmdref3/s17.html#pgfId-1572802
Also , you can change the timeout for the connections for specific IP's:-
http://www.cisco.com/c/en/us/td/docs/security/asa/asa82/configuration/guide/config/conns_connlimits.html
Thanks and Regards,
Vibhor Amrodia