Heirloom Daggers to Warglaives problem

[Attelisqt]

so I've changed Heirloom dagger (melee one) to Warglaive but it's not attached to character's back as it should. It's attached to characters side like a normal dagger. any1 know how to change the position so to make glaive attached to characters back?

sry for bad english.

If need some more info I can upload a screenshot of problem.
thanks.

[Attelisqt]

and noone knows...?