Unable to use item effects in hotbar

[kank]

Hello, I'm returning after a long break, reinstalled on a new computer etc.

I'm not able to use item effects (goblin gazhugi ring, rod of insidious glamour) in my hotbar with the hotbar keyboard shortcut. I have the item equipped, i drag the button to my hotbar from inventory. I can right click the hotbar button to cast the item effect, but hitting the keyboard shortcut doesn't cast the item effect.

Am I missing something obvious here?