Hello Narilka can you post a capx file for us to take a look at. Usually these are issues with the order of events. If you post a sample .capx file, then someone may be able to take a look and find the issue much faster for you.
Also, welcome to the community, can't wait to see what you create!
I HIGHLY recommend spending time reading the manual (you also get badges and reputation points for doing so), and also doing many tutorials.
Many items that seem to not work when starting with construct come from not being familiar with how the engine works.