Localize string event cant find string reference

Hello. Im new to Unity and Im trying to localize a university project, unfortunately when Im usnig localize string event component, even though I have string tables it doesnt pick up references for them. I dont know how to fix it, any ideas?

 

Hello Karl, thank you very much for your answer. I was doing that but it wasnt showing it up, after a lot of trouble and uninstalling Unity and reinstalling it again it finally started working! I dont exactly know what the issue was but now it is fixed and I am happy! thank you though ^_^