Site-to-Site with ISA 2004

Hi,

I am trying to set up a simple site-to-site VPN from my SBS 2003
running ISA 2004 to a client's office. Our internal subnet is:
192.168.16.X and the server internal IP is 192.168.16.2
The client has defined an IPsec tunnel, defining 192.168.16.X as the
remote subnet.
Now it seems like the tunnel is working since if I use one of the
machines on the network I am able to connect to the client's office.
But when I try to connect from the server itself the VPN does not
work. I can see in ISA monitoring that the request to connect to the
remote network is coming from the external IP of the server and not
the internal address, and I can assume this is the problem.

How can I solve this issue?

Thanks in advance!

Danny

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