Just a heads-up...
Seems Firefox 3 Release Candidate 2 has the same problem that Firefox 18.104.22.168 introduced - not auto-launching Network Connect.
This is Windows XP SP3 and SSL VPN 6.0R5 code. Manual launch is fine.
Juniper fixed this auto-launch problem last time this happened.
I filed a bug report with the Mozilla group - hope they can resolve as Firefox 3 release is only a few weeks away.
If you care about this bug please go to the above URL and vote so the FF developers will take notice.