Problem change resolution with BP

I have a problem with this blueprint.
I would like to change the screen resolution but doesn’t change when i click on one selected options in combo box.
The variables Resolutions is an array of strings and contains 5 resolutions (e.g. 1920x1080 / 1280x720 ecc.).
CBResolution is the name of the combo box.
Sorry for my bad english.

The resolution would not change in the editor. Have you tried it with a packaged built? Also, you may want to use a “switch on string” node to determine which resolution will be used. Alternatively you can use an “append” node with inputs "setres " -the resolution- “f”.