brush size shortcut key not working [not bracket]

usually old school person use the bracket [] to change the brush size, but i used to change it by using alt+right click (on my wacom pen first click, which is right click) and drag to change the brush size, found this doesnt work anymore after i update the latest version of photoshop cc, i try to reinstall the driver, swap the keyboard input to US, but still doesnt work, but this shortcut can work buy using alt+ right click ( ON MOUSE ), HELP,  I need a ways to solved this asap, rushing school assignment please.