Macro - Equip/Unequip Ring of Healing

[eidner]

Hi, I need a macro that will equip my ring of healing when at 65% mana, and unequip the ring at 95% mana. Im having a hard time trying to do this.

This is not working for me:

Self.Mana()<=275
Self.Equip.Ring(3098)
Self.Mana()=>315
Self.UnEquip.Ring(0)

Any help would be great. Thanks