Hello Timothy,
have the user try the following:
Close the Cisco VPN client, open up the Terminal in /Applications/Utilities and type in these commands:
cd /etc/CiscoSystemsVPNClient/Profiles
ls
pico .pcf
Once pico has opened up, scroll to the bottom (Control-V) and enter this line:
UseLegacyIKEPort=0
Then use Control-O, and Control-X to save and exit the profile. Now relaunch the Cisco VPN client, and see if that makes a difference.
HTH,
GNT