Problem Portforwarding my Router + Modem Dlink Combo

[Mark Quadros]

Modem:- 2520U Dlink


http://gyazo.com/7f95c9441f0d5f051269102f5cb78248

Router:- 600L Dlink


http://gyazo.com/b7831fc8afade2b9a786f85b56602e2c

For Port Forwarding to work i guess i need to port forward the same port on both devices, but i cant find the ADVANCED Option to port forward which i can see in every other screenshot guide to portforwarding my routers. Its really annoying!

EDIT* Tried using simple port forwarding but it doesnt seem to be working

 

[Mark Quadros]

http://canyouseeme.org/ says i dont have the port open
but when i test it via simple port forwarder it works :/

EDIT*Thats when i only connect port the dsl2520U and not the router
http://gyazo.com/fbaf7e113856d64cb69f85c962dfe7bc

But canyouseeme.org shows this
http://gyazo.com/7ce14db586f4a8427ed972d31ab0dd2f