This may be late but in case others may find it useful.
Checked the attached configuration of SA520 and the remote management port is set to port 443. By default the QuickVPN client uses port 443 though the logs attached shows that the Destination port is 60443. Can you please check if the QuickVPN client port is set to 443?
Note: If you want to use port 60443, then set 60443 on the Remote management page of SA500 and also for QuickVPN client.
If the problem still persist and QuickVPN client is behind a NAT router, make sure the Firewall is enabled on the PC where the QuickVPN client is installed. Also, the latest firmware 1.1.42 has fixed some known QVPN issues. You may want to upgrade to 1.1.42 and here is the link -
Article ID:3091 Reboot and Factory Default Reset on ISA500 Series
Integrated Security Appliances Objective Reboot or restart of the
network device is made when certain changes in the settings need reboot
or if the device is frozen. The configuration setti...
Article ID:3403 WAN Quality of Service (QoS) Policy Profiles Settings on
ISA500 Series Integrated Security Appliances Objective Wide Area Network
(WAN) Quality of Service (QoS) policy profiles manage traffic through
classed-based profiles. These profiles ...
Article ID:2922 Cisco QuickVPN Installation Tips for Windows Operating
Systems For a video showing installation tips on Quick VPN, visit
http://youtu.be/hHu2z6A78N8 Objective Cisco QuickVPN is a free software
designed for remote access to a network. It is...