Can't connect my server outside my wireless network. server is openERP running on ubuntu 12.04 desktop router is ciso small business router

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http://serverfault.com – I've looked on the internet regarding port forwarding. I've successfully fowarded port 8069 to my server's ip address. I can access openERP when I'm connected to the network of my office but not when I'm outside my office's network. What am I missing? my computer's ip address starts with 192... Do I have to first up the router's ip address and then my server's ip address to get to my server from the outside? what should I type in my internet browser? I've looked all day yesterday. (HowTos)