openSuSE 11.1 As Router - VPN SVN Problem

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http://forums.opensuse.org – Hello, I have a problem with my network. I use an opensuse 11.1 pc as a router, and a gentoo laptop as a vpn client. When I do svn update on my laptop while using vpn to my office, it won't do anything. I have to kill the process or it'll just stuck forever. But if I plug my laptop directly to the internet, the svn update (while connected through vpn) works. So how can I use opensuse as a vpn router? My suspicion is the ipsec support in firewall configuration screen in yast. It's greyed. So I can not enable it. How can I enable ipsec support for the firewall? Or is there another cause? (Distributions)