Using vpn/secured Application manager to connect remotely from vis

I use to have XP and I was able to log into my work network using vpn/secured
applications remotely. I recently obtained a new laptop with vista on it. I
go through the same set up but I continue to get the error of "this computer
is not set up to connect to the remote computer." I wondered if there was
some security set up or ie option that I'm missing. I even shut down the
firewall. I see Juniper loading and then that is it. Work claims it's not
them, which I agree, since the set up did work when it was xp. Any
information would be appreciated
--
Elizabeth