I'm having the same problem as AppleTree...i.e. I don't even have the local directory under /usr. Network Connect doesn't even install from the website, I an error that it could not launch (right after the download occurs) and to restart my browser and retry again. In the logs I see this:
./../webserver/:213 (08/29 18:35:57.860)[ Thread-27] copy stream to new file [/Users/xxx/Library/Java/Extensions/libJNPRAuthKit.jnilib]
../../webserver/:102 (08/29 18:35:57.960)[ Thread-27] Attempting to authorize system.privilege.admin:/usr/bin/java:0
NCAppController.:000 (08/29 18:36:00.753)[ Thread-27] Could not launch.
Please restart the web browser and try again.
NCAppController.:000 (08/29 18:36:00.753)[ Thread-27] Starting quit sequence...
NCAppController.:000 (08/29 18:36:00.753)[ Thread-27] Cleaning up
NCAppInstallImpl:000 (08/29 18:36:00.796)[ Thread-27] Failed to execute the install helper: java.io.IOException: Cannot run program "/usr/local/juniper/nc/install/ncinstallhelper": error=2, No such file or directory
NCAppController.:000 (08/29 18:36:00.797)[ Thread-27] Failed to cleanup
NCAppController.:000 (08/29 18:36:00.797)[ Thread-27] doQuit trying to load /dana/home/index.cgi
NCAppController.:000 (08/29 18:36:00.797)[ Thread-27] Loading
https://xxx.xxx.com/dana/home/index.cgi in current window
...for those of you that were able to get this to work, were you able to successfully install Network Connect from the browser first?