Pause doesn't work on my simple script does anyone know why?

[Venomacy]

The script works fine (switching f and leftshift), but when I press pause it keeps on working.. I want it to stop working when it's paused, could anybody help me out please?

this is my script (ahk file):

LShift::f
f::Lshift

[boiler]

Pause only pauses the current thread. Pressing a hotkey starts a new thread. Suspend disables hotkeys.