Port Fording

I have a small network that is having issue, with me allowing port forwarding to work properly this is the setup, COX cable coming into a Scientific Atlantic 2100 modem that is connected to an Airport Extreme and the device is connect to that.....  Now when I log into my Airport it tell me my WAN IP is 70.174.25.172 and my router IP address is 70.174.24.1... my deviceIP address is 10.0.1.80, if I look at my network settings on my mac it tell me the router address is 10.0.1.1 ...... I setup port forwarding in the airport to 10.0.1.80 using port 80 but cox cable has told me to use port 2000 instead for less traffic ?? with all this set I still can't get an connection inside of my network from outside ...... Any suggestions