Probably a ridiculously simple question (targeting frames in a movie)

I can target a movie from another movie just fine, but for some reason when I try to target a specific frame within a movie, from another movie that I’m already in, it will not work. All it does is replay the movie that I’m in.

I’ve tried a million different combinations of code, searched the internet repeatedly, but found nothing that has worked; and I’m about to throw my computer out the window! I know this should be ridiculously simple but… I can’t get it!

I’ll try and explain what I’m trying to do in a simpler way: I have my Root > One >> Onetwo, Onethree. Onetwo and Onethree are in the movie One, and One is on the main level/root. I want a specific frame in Onethree to gotoAndStop on a frame in Onetwo.

I know it sounds confusing but it’s a terribly simple thing – my code’s just not working. I would copy and paste what I’m doing but I’ve done every single combination imaginable to me so I’d rather just have someone here tell me how they would accomplish this.

Thank you so, so much for any help.