Juniper network connect f15 x86_64

[Eric Tanguy]

I tried to use juniper network connect java applet to connect to my 
university vpn. It worked fine with some tweaks on f14 i686. So i think 
the problem come from x86_64. The network connect applet load but never 
run.
$ rpm -qa | grep i686
compat-libstdc++-33-3.2.3-68.1.i686
libstdc++-4.6.0-7.fc15.i686
glibc-2.13.90-9.i686
nss-softokn-freebl-3.12.10-1.fc15.i686
compat-libstdc++-296-2.96-143.1.i686
zlib-1.2.5-3.fc15.i686
libgcc-4.6.0-7.fc15.i686

I installed jre-6u25-linux-amd64.rpm and it runs fine on firefox.
Someone could help me ?
Thanks
Eric