Starting Port: 25565
Ending Port: 25565
Protocol: Should drop down to Both
LAN IP Address: This will depend on your OS.. Get on your server,
if Mac: press command key + spacebar, and type in "terminal", then press enter when Terminal comes up. When it does, type 'ifconfig' in the terminal window. You'll see an IP address, normally 192.168.#.#, take this number and place it in LAN IP address
If Windows: Hold Windows Key down + R , and in the Run Command window type in "cmd" without quotes. Next, type ipconfig, you'll see an IP address in the sequence similar to 192.168.#.#, put that in LAN IP address.
You can ignore the report port/IP information. Press Apply.
If you're not sure it's still working,
http://www.t1shopper.com/tools/port-scan/run this and put in 25565, you'll see if there is something else blocking your minecraft port.
Good luck!