Mod key not working

[ThePenguinaut]

For some reason  my modkey wont work I changed it to another key but for some reason alt doesn't work I checked my alt key works but not when i try to use it, it doesn't work if anyone knows how to fix this please tell me

MODIFIER_KEY
{
    primary = LeftAlt
    secondary = RightAlt
    group = 0
    modeMask = -1
    modeMaskSec = -1
}