Additional pendant slot

I was gifted the additional pend slot package and I don't/can't seem to be able to get the additional slot.

I've tried double clicking the slot and dragging it over to my equip tab. How do I go about using it?

iirc its just like inventory slots. when you "buy" it in cs a notice pops up saying it has been added. no item appears in your cs or normal inventory. this was with the old cs.

sorry not sure about the whole gifting thing, didn't even know you could do that.

this came up on google: http://maplestory.nexon.net/Community/#%...nt-working

Would you happen to be trying to use it on an Angelic Buster?