Cubase 5 dont send midi signal to remote control

Hi, i new in the forum, i searched for this question in the forum but i didnt find anything
I trying to setup my control surface on cubase 5, cubase recieves the signal and fader works fine but cubase doesnt send midi signal to controler, so i can control cubase whit the external faders, but if i move a fader on cubase, the controler doesnt read (because cubase donst send any midi signal)
Someone know how to fix it?

Please help!