Increased Armor and Energy Shield not working

I applied this mod in my Armourer's Bench but it doesn't take any effect. I have 299ES and 921 Armor either equipped with those gloves or not, it doesn't change.

So what does this mod increase?

The reason is: Your armor does not have any armor or energy shield to be increased.

Enchanted mods only apply a bonus to the item you enchanted it onto.

There are two types of affixes: Global and weapon-specific ones.

• Weapon specific affixes only affect the weapon it is attached to.
  Examples: +X to Armor Rating (Armor), +X Fire Elemental Damage (Weapons)
• Global affixes affect everything.
  Examples: +X to health, +X mana regeneration per second, +X elemental resistance.

Note that 'X' could be a straight addition or percentage, and that some affixes only support one or the other.

Here's how the game works out your mods:

Because your glove has no Energy Shield or Armor Rating...
Armor: 0 Armor * 1.65 = 0 Armor
Energy Shield: 0 Energy Shield * 1.65 = 0 Energy Shield.