Opened port for WAN not working

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http://askubuntu.com – I need to open port 8069 on external IP. from router point, internal-ip and port 8069 was set (to forward to that local ip). So it should be possible to connect from external-ip:8069 to internal-ip:8069? But for some reason it is not working. Locally I can connect to with internal-ip:8069 to openerp server (through browser or gtk client). Do I miss something? Because outside lan, it is not possible to connect to that port (while it is possible to connect to other ports (but on different internal-ips). /etc/network/interfaces: auto eth0 iface eth0 inet static address netmask 25 (HowTos)