Button prototyping not working

Hi All,
I’m doing my first hi-fidelity mock-up and I have an issue that I can’t figure out. I created two new frames and want to link the button from the first frame to the second, but I can get the small plus to link them. I also tried duplicating one button that was linked to another frame, but as soon as I try to amend that ink to the new frame it will not work and I can’t link that button anymore anywhere. Do you have any ideas for what is happening and why? In the new frame I have the previous frame blurred and a box with text on the top of that the new button is in that box where used should accept to move to the next frame. Could this cause issues that the other frame is on the background?

Might be simple thing that I just don’t know. Any help apprechiated