一个关于ASA ASDM的连接问题，求解，谢谢先

笨笨轩

ASA 5525用ASDM连接上后，过段时间在ASDM界面上就显示“Lost connection to Firewall”，刷新后重新连上，过段时间出现相同的情况，有哪位帅哥美女碰过此类情况哈，帮帮小弟哈，在此先谢过了哈。
附版本信息：
ciscoasa# show version
Cisco Adaptive Security Appliance Software Version 9.1(2) <system>
Device Manager Version 7.2(1)
Compiled on Thu 09-May-13 16:20 PDT by builders
System image file is "disk0:/asa912-smp-k8.bin"
日志内容：
ciscoasa/admin# sh logging asdm
6|Nov 03 2014 17:30:54|106015: Deny TCP (no connection) from 10.0.91.31/51063 to 10.0.10.8/443 flags FIN ACK  on interface inside
6|Nov 03 2014 17:30:54|302013: Built inbound TCP connection 5065094 for inside:10.0.91.31/51064 (10.0.91.31/51064) to identity:10.0.10.8/443 (10.0.10.8/443)
6|Nov 03 2014 17:30:54|605005: Login permitted from 10.0.91.31/51064 to inside:10.0.10.8/https for user "jk01"
6|Nov 03 2014 17:30:54|302014: Teardown TCP connection 5065094 for inside:10.0.91.31/51064 to identity:10.0.10.8/443 duration 0:00:00 bytes 916 TCP Reset-O
6|Nov 03 2014 17:30:54|106015: Deny TCP (no connection) from 10.0.91.31/51064 to 10.0.10.8/443 flags FIN ACK  on interface inside
10.0.91.31是PC机IP，10.0.10.8是ASA 5525的管理IP