Pfsense OpenVPN Site-to-Site

[archimedes]

Hi!

I just installed two pfsense boxes to connect with OpenVPN.
One is the server, the other the client. I made the setup described in many howtos and the connection is up.
But I can't reach from the client network the remote network.
From the pfsense webfrontend I can ping the hosts in the remote net, the route is in the routing table and the ports in the firewall are opend. But I can't ping or reaching anything.

I can't find the error…