As the title states, whenever I click a button on a screen, instead of actually working, it opens the screen GUI. I feel like I'm just doing something stupid, but it just won't work. Is there an item I need to use, or is it a bug, or what? Redstone modules verify the button press did nothing. RFTools 4.23 on FTB Infinity Evolved.

You need to use left-click. Not right-click